What are the current sequence rules for patent applications?

This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice.

The current sequence rules for patent applications are outlined in 37 CFR 1.821-1.825 and World Intellectual Property Organization (WIPO) Standard ST.25. These rules became effective on July 1, 1998.

The MPEP states: The current sequence rules, which are embodied in 37 CFR 1.821-1.825 and World Intellectual Property Organization (WIPO) Standard ST.25, became effective July 1, 1998.

Note: For applications filed on or after July 1, 2022, new requirements under WIPO ST.26 apply. Refer to MPEP §§ 2412-2419 for guidance on these new requirements.