Can a 37 CFR 1.131(a) affidavit be used to overcome all types of prior art references?

No, a 37 CFR 1.131(a) affidavit cannot be used to overcome all types of prior art references. The MPEP 715 outlines specific limitations on the use of these affidavits: U.S. Patents and Applications: Cannot be used against U.S. patents or published applications naming another inventor with an earlier effective filing date. Statutory Bars: Cannot overcome…

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What is derivation in the context of pre-AIA patent law?

In the context of pre-AIA patent law, derivation refers to a situation where the subject matter in a patent, application publication, or other publication is derived from the inventor’s or at least one joint inventor’s own invention. MPEP 715.01(c) explains: When the unclaimed subject matter of a patent, application publication, or other publication is the…

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