Federal Circuit Finds Claims as a Whole Directed to Patent Eligible Non-Naturally Occurring Composition

On February 20, 2026, the Court of Appeals for the Federal Circuit (“CAFC”) issued a precedential opinion reversing and remanding a decision from the United States District Court for the District of Delaware finding the asserted claims of appellant’s patent invalid as directed to a patent-ineligible natural phenomenon under 35 U.S.C. § 101. Regenxbio Inc. v. Sarepta Therapeutics, Inc., __ F.3d __ (Fed. Cir. February 20, 2026).... By: A&O Shearman