This class relates only to gas for heating and illuminating
purposes and includes apparatus, processes, and compositions for
the manufacture of such gas and means for the purification, distribution,
and storage thereof.
(1)
Note. Every plant for producing gas from the combustion of
fuel necessitates the use of a furnace of some sort, and where the invention
alleged includes more than the furnace and extends into apparatus
for treating the gases or modifications of the furnace, adapting
it to treat them, the application belongs in Class 48, whether the
furnace, per se, be a limekiln or a smelting-furnace. In either
case the furnace is merely an element of the plant and if divided
out may be sent to its proper class.
SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
This class does not include the manufacture of gas--such as,
for example, oxygen, ozone, nitrous oxide, carbonic-acid gas, and
chemical gases in general. These are not heating or illuminating
gases. Gases consisting of a single "pure" carbon
compound and a process for synthesizing such a compound where the
intent is to recover the compound, per se, are in Class 260, Chemistry
of Carbon Compounds, its daughter Classes 530-570, or Class 585,
Chemistry of Hydrocarbon Compounds.
This class does not include charging and discharging devices
for retorts, nor does it include charging devices for cupola-generators,
such as the well-known bell-and-hopper type. For these two classes
of inventions see Class 202, Distillation: Apparatus, and Class
266, Metallurigical Apparatus, respectively, and Class 414, Material
or Article Handling, subclasses 147+.
This class does not provide for the destruction of gaseous
hazardous or toxic waste. See Class 423, Chemistry of Inorganic
Compounds, subclasses 210-215.5 for the chemical destruction of
gaseous hazardous or toxic waste. Note that subclasses 245.1-245.3
provide for an organic component.
Fuel and Related Compositions, appropriate subclasses for a solid or liquid fuel
composition or a method for making or purifying such composition
which may incidentally produce a burnable gas.
Internal-Combustion Engines, appropriate subclasses for devices for the purpose
set forth above that are claimed in combination with an internal
combustion engine or with any element thereof. This is not intended
to apply to claims which, while in the form of a combination, state
merely the intended use of the device--as, for example, "The
combination, with an internal-combustion engine, of" followed
by words defining the structure of a mixture-producing device not
itself classified in internal-combustion engines.
Devices for producing an explosive mixture from a liquid
hydro-carbon and air or for producing the combustible constituent
for such an explosive mixture, in which the operation of the mixture-producing
device does not necessarily depend upon the suction produced by
an internal-combustion engine, which mixture-producing device is
capable of operation independent of the engine and if continued
in operation would continue to produce an explosive mixture whether
or not the engine continued to operate, go in appropriate subclasses
in this class (48), notwithstanding the fact that the device may
be actually designed for the purpose of supplying an internal-combustion engine
with an explosive mixture and may be operated by such engine.
Devices in which it does not positively appear whether they
are operated by suction produced by an internal-combustion engine
or not, which could be so operated, but which do not necessarily depend
upon suction for their operation, go in appropriate subclasses in
this class (48). These devices ordinarily consist, essentially,
of a chamber containing a liquid hydrocarbon over or through which air
flows, it not positively appearing whether such air is forced through
such chamber as by a pump or is caused to flow therethrough by suction
produced by an engine.
Mineral Oils: Processes and Products,
subclasses 15+ for a mineral oil fuel, and other appropriate subclasses
for a process of deriving or treating a mineral oil in which process
no burnable gas composition is intended to be recovered.
Chemistry of Inorganic Compounds,
subclasses 210 through 215.5for the chemical destruction of gaseous hazardous
or toxic waste, and subclasses 237+ and 352+ for
processes of purifying or producing ammonia involving a chemical
reaction.
Combustion,
subclass 11 for a combustion process involving a gas mixing
or generating step, subclasses 36+ for a burner fed by
a generator with automatic control of the generator; subclasses
203+ for a generating fuel tank and an associated burner;
subclasses 233+ for a system in which a generator feeds
generated gas to an external structure without purification, fixation
or storage of the gas and also feeds gas to the burner heating the
generator; subclasses 207+ for a generator feeding an immediately associated
burner; and subclasses 354+ for a combined burner and mixer.
Chemistry of Hydrocarbon Compounds,
subclass 6 for a blend of gaseous hydrocarbons, subclass 14
for a hydrocarbon fuel and other appropriate subclasses for a process
of deriving or treating a hydrocarbon in which process no burnable
gas composition is intended to be recovered.
Refrigeration,
subclasses 600+ for processes and apparatus, per se, specialized
to the manufacture of a solidified or liquefied product from a gas
by physical treatment.
Connected generators and gas-holders, the pressure in the
generator regulating the supply of water in a to-and-fro or ebb-and-flow
movement to the carbid.
Apparatus and processes in which the acetylene gas is generated
and combined with some aeriform or gaseous fluid. It includes those
in which acetylene gas and another gas are simultaneously generated
in the same or adjacent apparatus or gas is generated and passed
over calcium carbid or mingled with acetylene gas.
Structures whereby water is fed to the carbid. The water
is fed by gravity and controlled by the pressure of the gas in the
generator or by the operation of the gas-holder. It also includes structures
for feeding the water to the carbid by capillary attraction. This
subclass includes generators in which water is fed by gravity to
the top of the carbid and automatically regulated by the gas-pressure
in the generator. A hand-valve is employed to turn on and off the
water-feed.
This subclass is indented under subclass 4. Generators in which the water-feed is regulated by the movement
of the gas-holder. This subclass includes structures whereby the
gas-holder operates a valve which feeds water to the top of the
carbid in the generator.
This subclass is indented under subclass 6. Generators in series of two or more in which the water-feed
is controlled by the gas-holder and automatically directed from
one generator to another.
This subclass is indented under subclass 5. Receptacles for carbid divided into communicating compartments
to which water, fed successively, is controlled by the holder.
This subclass is indented under subclass 5. Receivers to which the after-generation is conducted--that
is, when the gasometer has been filled with gas.
This subclass is indented under subclass 5. Structures feeding water from the gas-holder tank to the
generator, the gas-holder operating a valve located within the tank.
It also includes structures wherein a valved water-tank is located
within or on the gas-holder bell.
This subclass is indented under subclass 5. Cylinders, slatted or otherwise, for carbid which are caused
to rotate by the gas-holder and in which the water-feed is controlled
by the action of the gas-holder. This subclass also includes cylinders
rotated by gravity or hand in which the water-feed is operated by
the gas-holder.
This subclass is indented under subclass 5. Generators to which the water is supplied beneath the upper
surface of the carbid and regulated by the movement of the gas-holder.
This subclass is indented under subclass 5. Apparatus in which no valve is employed to regulate the
feed of water to the generator. It includes means for displacing
water, a flexible tube, a siphon or tilting vessel operated by the gasholder.
(1)
Note. In this subclass, the feed of water is controlled by
the gas-pressure in the generator or holder acting upon the column
of water to be fed. It also includes means carried by the gas-holder
not otherwise classified under the subclasses of "Valveless
feed".
This subclass is indented under subclass 13. Devices, such as a wedge, piston, bucket, float, etc., carried
by the gas-holder for displacing water contained in a tank, causing
it to overflow and pass to the generator.
This subclass is indented under subclass 13. Flexible tubes for feeding water to the generator carried
by the gas-holder connected to and elevated and depressed within
or above and below the water-supply.
This subclass is indented under subclass 13. Generators directly connected to the interior of the gas-holder
and caused to dip in and out of the water in the gasholder tank
to feed water to the interior of the generator.
This subclass is indented under subclass 13. Siphon-tubes carried by the gas-holder for making connections
between the water-tank and the generator for feeding water.
This subclass is indented under subclass 13. Trunnioned or pivoted vessels operated by the gas-holder
so as to discharge water into a pipe leading to the generator.
This subclass is indented under subclass 4. Generators containing carbid to which the water is admitted
by an ebb-and-flow movement produced by the gas-pressure in the
generator.
This subclass is indented under subclass 19. Two or more generators having means for supporting carbid
to which a body of water is supplied from beneath in an ebb-and-flow movement
produced by the pressure of the gas in the generator.
This subclass is indented under subclass 19. Receptacles for carbid divided into separate compartments
or superposed and to which water fed successively from below in
a body is controlled by the pressure of the gas in the generator.
This subclass is indented under subclass 19. Receptacles in the form of a bell and tank stationary one
within the other, and means provided within the bell for supporting
the carbid to which water is fed from beneath by a to-and-fro or
ebb-and-flow motion controlled by the pressure of the gas in the
bell.
This subclass is indented under subclass 4. Receptacles for carbid divided into communicating compartments
to which water is fed successively. The receptacles may be in series.
In this subclass, the water is fed drop by drop to the top of each
successive cell and controlled by the pressure of the gas in the
generator.
This subclass is indented under subclass 4. Generators in which water is supplied to the carbid by capillary
attraction. In this subclass, an absorbent is used to conduct the
water.
This subclass is indented under subclass 25. Structures whereby the absorbent, through which the water
is fed by capillary attraction, may be adjusted to and from the
carbid.
This subclass is indented under subclass 4. Generators wherein means and materials are employed, except
capillary feed, through which water seeps in its passage to the
carbid.
This subclass is indented under subclass 27. Percolating water-feed generators having valves operated
by the pressure of the gas in the generator to regulate the flow
of water.
This subclass is indented under subclass 4. Cans or cases for carbid constructed of telescopic sections,
each having a closed end, one of which sections may be spring-pressed
or it may be an open-top can containing carbid in which is placed
a follower which may be spring or weight-pressed.
This subclass is indented under subclass 4. Vessels constructed of flexible elastic material for feeding
water to the carbid, the pressure in the generator causing a to-
and-fro movement.
This subclass is indented under subclass 4. Vessels divided by a partition-wall into two communicating
compartments, one of the compartments connecting with the generator
to supply water thereto and receive gas therefrom, the pressure
of the gas in the generator and compartment regulating the water-feed
to the generator and causing the water to flow to and from the second
compartment.
This subclass is indented under subclass 4. Trunnioned receptacles provided with a support for the carbid
and means to oscillate the same, whereby water in the lower part
of the receptacle may be intermittently brought in contact with
the carbid.
This subclass is indented under subclass 4. Cylinders of or for containing carbid, caused to rotate
or oscillate, whereby the hydrate, due to decomposition of the carbid
and water, is removed by agitation. This subclass includes cylinders,
slatted or otherwise, rotated or oscillated by hand or gravity,
also cylinders composed of carbid, and cylindrical carriers for carbid-packages.
This subclass is indented under subclass 4. Generators to which the water is supplied within and beneath
the upper surface of the carbid, drop by drop.
This subclass is indented under subclass 4. Devices for preventing accidents in the handling of the
generator, including means for interlocking two or more valves or
means which extend over or secure the cover to the generator and
simultaneously operate either one or more of the following valves:
the gas-outlet valve, the water-inlet valve, or the sludge-valve;
or vent the generator.
Generators containing water into which the carbid is fed.
This subclass contains generators to which the carbid is fed not
otherwise classified under the various subclasses of "Carbid-feed".
Article Dispensing, appropriate subclasses for article feeding subcombination,
per se, Class 48 having only significant generator combinations
or feeding subcombinations so specialized to the performance of
the generating function as to preclude classification in a general
dispensing art.
Dispensing, appropriate subclasses for fluent material feeding,
per se, not combined with generator structure or not specialized
for use with generators.
This subclass is indented under subclass 38. Generators in which an endless belt or an apron is employed
to feed the carbid to the water. It does not include aprons or belts
carrying buckets containing measured charges of carbid.
This subclass is indented under subclass 38. Generators in which the carbid is caused to dip in and out
of the water. In this subclass the carbid may be suspended from
or held in suitable means supported by the gas-holder or supported
by a piston or supported by yielding means within the tank.
This subclass is indented under subclass 41. Dip carbid-feed generators wherein the carbid-receptacle
is composed of a number of chambers or compartments which are successively brought
in contact with the water.
This subclass is indented under subclass 38. Carbid-feed generators having flap valves hinged at or near
the mouth of the chute or hopper through which the carbid passes,
automatically operated to feed the carbid.
This subclass is indented under subclass 38. Generator-tanks to which the carbid is fed by hand. In this
subclass, the carbid may be fed loosely or put in holders; does
not include cartridges.
This subclass is indented under subclass 44. Generators provided with suitable means for supporting carbid
which is caused to dip in and out of the water, the carbid being
fed through a hand-operated valve.
This subclass is indented under subclass 38. Means for feeding definite charges of carbid. In this subclass
will be found devices not otherwise classified under "Measured
charges". This subclass includes those structures caused to
reciprocate and discharge in the tank.
This subclass is indented under subclass 46. Includes a series of receptacles arranged on the same horizontal
plane supported by means caused to rotate and discharge the receptacles successively.
The receptacles may be provided with hinged bottoms and means for
securing and releasing the same, or the receptacles may be trunnioned
and provided with means for dumping the same or an endless belt
provided with pockets.
This subclass is indented under subclass 48. Pocket-wheels arranged to rotate on a vertical plane and
discharge successively. The pocket may be provided with lids and
means for opening and closing the same. It also includes an endless
belt having cups or carriers.
This subclass is indented under subclass 46. Receptacles for carbid which have a fixed relation with
the generator. They may be hinged and caused to dump, or they may
be receptacles provided with hinged or sliding bottoms with catches
and releasing means or a receptacle divided by a series of hinged
or sliding shelves with catches and releasing means.
This subclass is indented under subclass 38. Carbid feed generators having a plate arranged beneath the
discharge-opening of the carbid-hopper with an intervening space,
the carbid resting upon the plate. The plate may be in the form
of a disk or curved.
This subclass is indented under subclass 38. Carbid feed generators having valves caused to pass to and
fro or through the discharge-opening of the carbid-hopper in a vertical
plane.
This subclass is indented under subclass 38. Carbid feed generators in which the valve slides upon its
seat distinguished from the structure in ... , in that there is
no intervening space between the valve and the mouth of the hopper
or seat.
Generators in which the valves controlling the water-feed
and the gas outlet are connected so as to open or close simultaneously.
It also includes the simultaneous venting of the generator.
Special Receptacle or Package, particularly
subclass .6 , subclass .7 and subclass 524.1, and the places
specified in the notes to such class and subclasses for other packages
of chemicals.
This subclass is indented under subclass 59. Cartridges in which the carbid is combined with an agglutinating
and protecting substance and formed into briquets, tablets, sticks,
etc.
Plastic and Nonmetallic Article Shaping or Treating:
Processes,
subclass 30 for processes directed to furnace lining formation
or repair and the search notes thereto, and subclasses 31+ for
forming structural installations in situ.
Chemistry: Electrical and Wave Energy, appropriate subclasses, and other related classes
for electrical or wave energy apparatus, excepting radiant energy
apparatus provided for in Class 250, Radiant Energy, specialized
for the preparation of gaseous compounds or elements and involving chemical
reactions which are caused by more than the mere thermal effects of
the electrical or wave energy.
This subclass is indented under subclass 62. Cupola structures provided with a bottom for supporting
the fuel, constructed to rotate or rock. Does not include rotary
grates.
This subclass is indented under subclass 62. Cupola structures having an open bottom and a basin or trough
for water, forming a seal for closing said open bottom and through
which the ash is removed.
This subclass is indented under subclass 62. Cupola structures in which coal is distilled or gasified
and into which steam or water is injected and decomposed and into
which oil or oil-vapor is also injected. The oil-vapor may be added
to the coal and water gas outside of the distilling chamber.
This subclass is indented under subclass 62. Generators in the form of a cupola or shaft in which coal
is distilled or gasified and into which oil or oil-vapor is introduced
or oil-gas is added.
This subclass is indented under subclass 62. Cupola structures in which coal is distilled or gasified
and into which steam is injected and decomposed. Water-gas may be
made separately and added to the coal-gas.
This subclass is indented under subclass 62. Cupola structures having a filling of refractory material,
such as brick, so as to be heated to a high temperature.
This subclass is indented under subclass 62. Cupola structures for containing a bed of incandescent fuel
to which steam is admitted. This subclass includes the alternate
process of first blasting with air and then decomposing steam.
This subclass is indented under subclass 78. Cupola structures for producing water-gas by the alternate
process by first blasting and then decomposing steam. The water-gas
thus produced is then carbureted by the addition of a hydrocarbon
fluid, oil vapor, or oil-gas. In this subclass, the water-gas is
passed through an ordinary carbureting vessel containing oil.
This subclass is indented under subclass 79. Containing in addition to the cupola structure for the production
of water-gas by the alternate process a chamber filled with refractory
material to be highly heated and into which a hydrocarbon oil is
admitted. Oil-gas may be admitted into this chamber, the oil or
oil-gas combining with the water-gas.
This subclass is indented under subclass 79. Combining with the well known cupola structure for the production
of water-gas a retort to and through which the water-gas passes
and to which a hydrocarbon oil or vapor is simultaneously admitted.
This subclass is indented under subclass 78. Cupola structures containing a body or bodies of incandescent
fuel through which the steam is caused to pass first upwardly and
then downwardly, or vice versa.
This subclass is indented under subclass 82. Cupola structures for making water-gas by the up-and-down
run provided with connected valves for changing the direction of
the run.
This subclass is indented under subclass 78. Combined cupola structure for the production of water-gas
and a means for producing oil-gas and combining the two gases.
Chemistry of Inorganic Compounds,
subclasses 246+ and subclass 418.2 for processes of purifying or
making carbon monoxide wherein a chemical reaction is involved.
Cupola generators in which the cupola body or a section
thereof is movable for the purpose of agitating the fuel to prevent "scaffolding" and the
like.
(1)
Note. This subclass is not intended to include structures
of the cupola or cylindrical type wherein the bottom or the cover,
per se, is caused to rotate, such as are found in this class, subclasses
66 and 68.
This subclass is indented under subclass 62. Miscellaneous means for feeding fuel to the cupola gas-generator.
(1)
Note. Does not include the bell-and-hopper structure, such
being classified in Class 266, Metallurgical Apparatus, appropriate
subclasses, and in Class 414, Material or Article Handling, subclasses 147+.
This subclass is indented under subclass 62. Means applied to cupola structures, such as pressure-indicators,
means for distributing steam, means for switching the blast or run, removable
bottoms, fuel-rammers, poke-holes, peep-holes, oil-spraying devices,
etc.
This subclass is indented under subclass 89. Individual plants consisting of a retort, purifier, condenser,
and holder. The retort may be placed in an ordinary cookstove. They
may omit the purifier, condenser, or holder.
This subclass is indented under subclass 94. Retorts into which oil, steam, or water and air are injected
to be gasified. The air may be added to the gas produced from the
oil and steam or water.
This subclass is indented under subclass 94. Retorts into which oil and steam or water are injected and
the resultant gas passed through a vessel containing hydrocarbon
fluid.
This subclass is indented under subclass 89. Combined retorts for gasifying coal and means for introducing
steam or water and oil. The water or steam may be converted into
CO, H, and the oil gasified in separate retorts and combined with
the coal-gas.
This subclass is indented under subclass 89. Combined retorts for gasifying coal and means for introducing
oil therein or for combining the coal and oil gas.
Combustion,
subclasses 207+ for a burner fed by a retort and for a retort utilizing
heat derived from the generated gas. However, where an unburned
portion of the gas generated in the retort is purified, fixed, or stored,
classification is in appropriate subclass of Class 48.
Chemistry: Electrical and Wave Energy, appropriate subclasses for electrical or wave energy
generators, excepting radiant energy apparatus provided for in Class
250, Radiant Energy, specialized for the preparation of gaseous
compounds or elements, and involving chemical reactions which are
caused by more than the mere thermal effects of the electrical or
wave energy.
This subclass is indented under subclass 102. Retorts in which oil is gasified with the gas- pressure
being used to entrain air on its way to the gasometer. In this subclass,
the gas is purified or fixed on its way to the storage-gasometer.
The retort is heated by a portion of the gas generated.
(1)
Note. This subclass does not include similar devices where
a portion or all of the gas is burned to heat the retort, in which
there is no fixation, purification, or storage of the gas.
This subclass is indented under subclass 102. Vessels containing a body of oil into which steam is injected;
also includes devices feeding oil for gasification into a highly-superheated
jet of steam for decomposition.
This subclass is indented under subclass 102. Devices whereby the oil fed to the retort is regulated by
the pressure of the gas either in the retort or gasometer.
This subclass is indented under subclass 102. Combined retorts for gasifying oil and means for introducing
air or oxygen. The air or oxygen may be added to the oil-gas after
it leaves the retort or in the gasometer.
This subclass is indented under subclass 89. Retorts in which wood, peat, sawdust, or other vegetable
matter is distilled for making gas and to which steam may be added
and decomposed.
This subclass is indented under subclass 111. Retorts in which wood, etc., is distilled for making gas
and into which oil is injected or separately gasified and added
to the wood-gas. Steam may also be injected.
This subclass is indented under subclass 89. Furnace structures to generate for producer-gas for heating
benches of retorts. The furnace may have flues for the passage of
air, and also flues for the passage of the products of combustion whereby
the air is heated. This subclass includes settings for the retorts
and processes for heating the retorts.
This subclass is indented under subclass 116. Combined hydrogen-generators and means for carbureting air
and mixing the two gases, which may further carburet the mixture.
This subclass is indented under subclass 116. Generators in which a hydrocarbon oil floats on the surface
of the acid solution and through which the generated hydrogen passes.
This subclass is indented under the class definition. Vessels constructed of metal, clay etc., for gasifying materials
by heat applied thereto. This subclass includes retorts of various designs
arranged on a horizontal plane.
CONVERSION OF HYDROCARBON GAS AND BLENDING OF PRODUCT WITH
FURTHER HYDROCARBON GAS, PROCESS:
This subclass is indented under the class definition. Process in which a normally gaseous hydrocarbon or gaseous
mixture containing predominantly such hydrocarbon is subjected to
a chemical reaction and a normally gaseous hydrocarbon or gaseous
mixture is mixed with the reaction product.
(1)
Note. The unreacted hydrocarbon gas may have the same composition
as the gas fed to the reaction or a different composition.
(2)
Note. The process often has for its purpose the lowering of
the BTU value of a batch of natural gas, which is split, one part
treated, and recombined.
METHANE (NATURAL GAS)-CONTAINING PRODUCT, OR TREATMENT
OR RECOVERY PROCESS:
This subclass is indented under the class definition. Subject matter in which a gaseous product composition containing
methane is claimed or in which a process is claimed which results in
such a product.
This subclass is indented under subclass 127.3. Process in which a compound included in the feedstock to
the process is changed to another compound.
(1)
Note. The resulting compound may be methane or the entire
reaction may be concerned with a compound other than methane, for
example, an impurity compound in a mainly-methane stream may be
reacted to remove it or make it less objectionable.
This subclass is indented under subclass 127.5. Subject matter which employs an extraneous accelerator or
retarder for the reaction.
(1)
Note. This subclass (127.7) serves as a collection place for
cross-reference copies of patents wherein a methane-containing mixture
is recovered from an enzyme-catalyzed reaction.
Chemistry: Molecular Biology and Microbiology,
subclass 167 for the manufacture of methane by fermentation,
that is, bacterial or other enzyme-catalyzed synthesis.
APPARATUS FOR CONVERTING OR TREATING HYDROCARBON GAS:
This subclass is indented under the class definition. Apparatus which uses a hydrocarbon gas as a feedstock or
in which a hydrocarbon gas is an effluent.
This subclass is indented under the class definition. Means not otherwise classifiable wherein gas is subjected
to the action of a medium capable of removing impurities.
This subclass is indented under subclass 144. Vessels constructed to contain hydrocarbon liquid, or to
which the same is fed drop by drop, and to which air is admitted
under atmospheric pressure, and from which the carbureted air passes
by gravity.
This subclass is indented under the class definition. Means for directing the passage of the gas through two or
more purifiers and for by- passing one or more.
This subclass is indented under the class definition. Means for drawing the gas from the generator, regulating
the action of the same, and preventing the formation of a vacuum.
This subclass is indented under the class definition. Vessels for the storage of gas. This subclass includes stationary
vessels and independent parts to be used in the construction of
the holder.
This subclass is indented under subclass 174. Structures consisting of an open-top tank and an inverted
bell. The tank may be provided with a purifier through which the
gas passes on its way to the bell; or with a chamber for storing
oil or various utensils used around the works.
This subclass is indented under subclass 176. Structures where the bell is divided horizontally into sections
having water-seal joints and telescoping.
This subclass is indented under subclass 174. Holders comprising a plurality of sections of which one
or more is flexible and so related that the holder may collapse.
Fluid Handling,
subclass 3 for a process of general utility involving control
of the mixing of diverse fluids, subclasses 98+ for a self-proportioning
flow system of general utility and subclasses 602+ for
a fluid handling system having plural inlets and a single outlet
for fluids other than heating or illuminating gas.
Fluid Sprinkling, Spraying, and Diffusing,
subclasses 8+ for a sprinkling, spraying or diffusing process
of general utility involving mixing; and subclasses 398+ for
a combined mixing and spraying structure of general utility including
a flow modifying terminal outlet means.
Combustion,
subclasses 354+ for a fuel-oxidizer mixing and flame holding assembly
where the flame holder is no more than an abruptly terminated flow
means.
This subclass is indented under subclass 180.1. Mixers comprising a bell and tank within which the gases
are mixed, the movement of the bell controlling the supply of gases
or air and gas.
This subclass is indented under subclass 181. Devices where the mixture of gases or gas and air takes
place before entering the bell and is controlled thereby.
This subclass is indented under subclass 180.1. Devices where a diaphragm operates the valves controlling
the supply of gases or gas and air, the pressure of the gas operating
the diaphragm.
This subclass is indented under subclass 180.1. Devices where a body connected to and operating the supply-valves
for the gases or gas and air is made buoyant by the specific gravity
of the gas.
This subclass is indented under subclass 187. Devices where the air and gas or gases are mixed beyond
the drum, the drum being used to force one or both of the elements.
This subclass is indented under subclass 180.1. Apparatus having provision for three or more different combustible
gases or gases which support combustion to separately enter the apparatus.
(1)
Note. Any difference in the gases is sufficient to make them
different.
(2)
Note. This subclass includes for example devices which mix
a high calorific fuel gas, a low calorific fuel gas and air.
This subclass is indented under subclass 189.4. Apparatus which includes an element made of fibers or strands
which cross and touch each other, including a single strand which
loops and touches itself.
(1)
Note. This subclass includes for example screen, woven or
nonwoven fabric, a mass of steel wool, etc. The fibers or strands
may or may not be attached together where they cross as by adhesive,
etc.
This subclass is indented under the class definition. Means and methods for the distribution of gas.
(1)
Note. This subclass contains miscellaneous patents not otherwise
classified, such as those for preventing the freezing in the pipes,
charging distributing holders on trains, ships, etc.
Pipes and Tubular Conduits, appropriate subclasses for pipes and tubes, especially
subclasses 32+ for devices of general application for the prevention
of fluid in pipes from freezing.
Pipe Joints or Couplings,
subclasses 13+ for a coupling combined with leakage disposal means,
and subclasses 148.6+ for compound joints. See the Search
Notes thereunder.
for a process in which a hydrocarbon gas feedstock
is converted to fuel gas of a different composition and this latter
composition is blended with hydrocarbon gas.
Fuel and Related Compositions,
subclasses 300 through 459for liquefied, normally gaseous fuel compositions,
classified principally on the basis of nonhydrocarbon additives thereto.
Chemistry: Electrical and Wave Energy, for production of gaseous compounds or elements involving chemical
reactions which are caused by more than the mere thermal effects of
electrical or wave energy, especially
subclasses 170+ for a process involving a chemical reaction brought about
by an electrostatic field or electrical discharge to produce a gaseous hydrocarbon.
Electrolysis: Processes, Compositions Used Therein,
and Methods of Preparing the Compositions, for electrolysis, especially
subclasses 334+ for electrolytic synthesis of a chemical compound
or element.
Chemistry of Inorganic Compounds,
subclasses 210 through 215.5for the chemical destruction of gaseous hazardous
or toxic waste. Note that subclasses 245.1-245.3 provide for an organic
component.
Chemistry: Fischer-Tropsch Processes; or Purification
or Recovery of Products Thereof, for processes of producing nonfuel gases, which
are not specifically set forth as being useful as fuels, by the
reaction of hydrogen with carbon oxides.
Chemistry of Hydrocarbon Compounds, particularly
subclass 14 , for liquified, normally gaseous fuel compositions
which are mixtures of hydrocarbons only.
Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the use of heat, vacuum,
or chemical agents when destroying or containing hazardous or toxic
waste.
This subclass is indented under subclass 198.1. Subject matter in which the conversion process employs a
normally solid material in its liquid state or carbon particles
(which may be carbon particles produced in the same or a different stage
of the process) or self-sustaining element having pores which permit
the passage of some, but not all, components of a gaseous composition.
This subclass is indented under subclass 198.1. Subject matter in which the gaseous product of the process
is subjected to a further treatment which does not change the chemical
nature of the finished desired product.
Refrigeration, appropriate subclasses for a process for purifying
or separating gas compositions via the liquefaction or solidification
of normally gaseous materials.
This subclass is indented under subclass 198.1. Subject matter in which a feedstock or an intermediate mixture
contacts particles of a metal which can be converted to a carbide
of the metal or oxygen-containing particles which can give up their
oxygen to another gas used in the process.
(1)
Note. The particles involved must be described as carbidable
or oxygen-donating or the carbiding or oxygen-donating reaction
must be described as taking place.
This subclass is indented under subclass 198.1. Subject matter in which a gas involved in the process is
described as traveling through a particle mass in a specified direction,
e.g., vertically, downwardly, etc., or in opposite directions through
the same particle mass at different stages of the process.
(1)
Note. The mere statement that the particle mass is fluidized,
or words to that effect, is sufficient for placement in this subclass.
for a similar process in which metal or oxide particles,
ordinarily considered a catalyst, chemically combine with carbon
or yield oxygen to a reactant.
This subclass is indented under subclass 198.1. Subject matter in which an internal combustion engine or
other producer of mechanical energy is used as a reactor apparatus,
or where the speed of gas flow to, through or from the reactor is
specified or where the angle of the path of gas flowing into a reactor
is specified.
This subclass is indented under subclass 197. Processes for gasifying coal and oil and decomposing water
and combining the resultant gases. These elements may be separately gasified
and united or conjointly gasified.
This subclass is indented under subclass 197. Processes for making and combining coal and olefiant gases.
They may be made separately and united or made combined.
This subclass is indented under subclass 197. Processes for gasifying coal and combining therewith water-gas
or simultaneously gasifying coal and decomposing steam in the same retort.
This subclass is indented under subclass 197. Processes for making the well-known Siemens producer gas,
which consists in blasting with air an ignited bed of fuel.
This subclass is indented under subclass 204. Processes whereby steam is decomposed by being passed through
a body of incandescent fuel and then carbureted by means of a volatile hydrocarbon
either in the form of a liquid, vapor, or gas.
This subclass is indented under subclass 204. Processes for the continuous manufacture of water-gas by
bringing steam into contact with coal maintained at a decomposing
temperature either by internal combustion or heat applied.
This subclass is indented under subclass 204. Processes wherein steam is admitted to the top of a bed
of incandescent fuel, passes through, and the resultant gas drawn
off at the bottom.
This subclass is indented under subclass 204. Processes in which steam is caused to pass upwardly and
downwardly, or vice versa, through a body or separate bodies of
incandescent fuel.
This subclass is indented under subclass 197. Processes for gasifying wood, sawdust, peat, or other vegetable
matter. The gas generated may be carbureted or have added to it
oil or oil gas or other gas.
Distillation: Processes, Thermolytic, appropriate subclassesfor a process of destructive distillation of wood, sawdust,
peat or other vegetable matter.
Mineral Oils: Processes and Products, particularly
subclasses 106+ for the production of both a gas and a mineral oil
from a mineral oil unless the oil produced is merely incidental
to the production of a gas from the oil feed.
This subclass is indented under subclass 211. Processes where oil and air are injected into a heated retort.
The air may be added to the gas produced from the oil.
This subclass is indented under subclass 214. Processes wherein oil, steam, and air are injected into
a highly heated retort. The air may be added to and mixed with the
gas resulting from the decomposition of the oil and steam or water.
Processes for generating acetylene gas by the mutual decomposition
of calcium carbid and water and for preparing calcium carbid for
such use. This subclass covers processes of the first type.
Chemistry: Electrical and Wave Energy,
subclass 171 for processes of producing acetylene gas by a chemical
reaction brought about by an electrostatic field or an electrical discharge.
Electrolysis: Processes, Compositions Used Therein,
and Methods of Preparing the Compositions, for electrolysis, especially
subclass 462 for electrolytic synthesis of a hydrocarbon.
Chemistry of Hydrocarbon Compounds,
subclasses 534+ for a process of synthesizing acetylene or a hydrocarbon
derivative thereof where the intent is to produce a relatively pure
organic compound.
This subclass is indented under subclass 216. Processes in which a retarded generation of acetylene is
produced in contra-distinction to the usual rapid generation.
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