What is the central facsimile number for patent application-related correspondence at the USPTO?
The central facsimile number for patent application-related correspondence at the USPTO is (571) 273-8300. According to MPEP 502.01:
All patent application related correspondence transmitted by facsimile must be directed to the central facsimile number, with a few exceptions below. The central facsimile number is (571) 273-8300.
This central number should be used for most patent-related correspondence, including replies to Office actions and after-final amendments. However, there are specific exceptions for certain types of correspondence that should be sent to other facsimile numbers, as outlined in the MPEP.
To learn more:
Topics:
MPEP 500 - Receipt and Handling of Mail and Papers,
Patent Law,
Patent Procedure