What does a judgment of “no interference-in-fact” mean in patent law?

A judgment of “no interference-in-fact” in patent law means that no interference proceeding is necessary to resolve priority between the parties. As stated in MPEP 2308.03(b):

“A judgment of no interference-in-fact means that no interference is needed to resolve priority between the parties.”

This judgment indicates that the claims of the parties do not overlap in a way that requires a formal interference proceeding to determine who has the right to the invention.

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Topics: MPEP 2300 - Interference And Derivation Proceedings, MPEP 2308.03(B) - No Interference - In - Fact, Patent Law, Patent Procedure
Tags: Interference Proceedings, Interference-In-Fact, patent claims, patent priority