How do I claim benefit of a prior application’s filing date in a CIP?

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.

To claim the benefit of a prior application’s filing date in a continuation-in-part (CIP), you need to follow specific procedures. The MPEP ¶ 2.06 states: “Should applicant desire to claim the benefit of the filing date of the prior application, attention is directed to 35 U.S.C. 120, 37 CFR 1.78, and MPEP § 211 et seq.”

This means you must:

• Make a proper benefit claim under 35 U.S.C. 120
• Comply with the requirements outlined in 37 CFR 1.78
• Follow the guidance provided in MPEP § 211

It’s crucial to properly establish the benefit claim to secure the earlier filing date for the common subject matter.