| Patents > Search Colections > MPEP > 805 Effect of Improper Joinder in Patent [R-3] - 800 Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting |
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805 Effect of Improper Joinder in Patent [R-3] - 800 Restriction in Applications Filed Under 35 U.S.C. 111; Double Patenting
805 Effect of Improper Joinder in Patent [R-3]
35 U.S.C. 121, last sentence, provides "the validity of a patent shall not be questioned for failure of the *>Director< to require the application to be restricted to one invention." In other words, under this statute, no patent can be held void for improper joinder of inventions claimed therein.
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