Source: FAQ (MPEP-Based)BlueIron Update: 2024-09-27
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.
MPEP 805 provides a clear interpretation of the last sentence of 35 U.S.C. 121. The MPEP states:
“In other words, under this statute, no patent can be held invalid for improper joinder of inventions claimed therein.”
This interpretation emphasizes that the statute protects patents from being invalidated due to the inclusion of multiple inventions. It clarifies that even if a patent contains improperly joined inventions, this fact alone cannot be used as grounds for invalidating the patent.