News & Analysis as of

Patent Validity Intellectual Property Litigation CAFC

McDermott Will & Schulte

Specification controls: Written description must be clear

The US Court of Appeals for the Federal Circuit reversed a district court’s decision upholding patent validity, finding that the subject patent’s specification clearly established that the written description failed to...more

Knobbe Martens

Reissue Applications Are Bound by the Scope of the Claims as Written, Not as Intended

Knobbe Martens on

IN RE KOSTIC - Before Stoll, Clevenger, and Cunningham. Appeal from the Patent Trial and Appeal Board. When considering whether a reissue claim broadens the scope of the original patent, the PTAB determines the actual scope...more

A&O Shearman

Federal Circuit Rejects PTAB’s Implicit And Incorrect Claim Construction Of “Between 1 And 10”

A&O Shearman on

On May 23, 2025, the United States Court of Appeals for the Federal Circuit (“CAFC”) issued a precedential opinion reversing a final written decision from the U.S. Patent Trial and Appeal Board (“PTAB”) finding the challenged...more

BakerHostetler

[Podcast] Make It Plain: Clarity Regarding Obviousness-Type Double Patenting

BakerHostetler on

In a year defined by landmark decisions, impactful announcements and new standards, clarity in the patent world comes as a welcome relief. It arrived via a federal circuit court decision in August 2024 that settled certain...more

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