What are “patentably indistinct claims” in the context of interfering 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.

“Patentably indistinct claims” in the context of interfering applications refer to claims from different applications that are substantially similar or overlapping in scope. According to MPEP 2304.01(d):

“Interfering claims of applications with either the same assignee or the same inventive entity are ‘patentably indistinct claims’ within the meaning of 37 CFR 1.78(f).”

These claims are typically subject to consolidation or restriction requirements to streamline the examination process and address potential interferences efficiently.