Correspondence address used for filing new international applications, responses to invitations, demands, national phase entry paper, etc.
Mail Stop PCT
Commissioner for Patents
PO Box 1450
Alexandria, VA 22313-1450
Hand delivery address* used for filing new international applications, responses to invitations, demands, national phase entry paper, etc. be deliver services (Federal Express (Fed Ex), UPS, DHL, Laser, Action, Purolator, etc.)
United States Patent and Trademark Office
Customer Service Window, Mail Stop PCT
Randolph Building
401 Dulany Street
Alexandria, VA 22314
* The location for the Customer Service Window is on the first floor of the south side of the Randolph Building with street level access from Ballenger Avenue.
Correspondence and hand delivery addresses used for filing petitions and other legal matters in international applications and national phase applications filed under 35 U.S.C. 371.
Correspondence Address
Mail Stop PCT
Attention: International Patent Legal Administration
Commissioner for Patents
PO Box 1450
Alexandria, VA 22313-1450
Hand Delivery Address
United States Patent and Trademark Office
Customer Service Window, Mail Stop PCT
Attention: International Patent Legal Administration
Randolph Building
401 Dulany Street
Alexandria, VA 22314
Address for PCT Operations customer service for inspecting files located in PCT PALM locations. Customer should call 703-756-1800 to make arrangements to inspect a file.
PCT File Inspection Location
File Information Unit
Randolph Square Building
Room 3A20
2800 South Randolph Street
Arlington, VA 22206