REGENXBIO Inc. v. Sarepta Therapeutics, Inc.

  1. February 20, 2026

    Fed. Circ. Unwinds Ineligibility Ruling For Gene Therapy IP

    The Federal Circuit on Friday saved Regenxbio and the University of Pennsylvania's gene therapy patent, finding that splicing together genes from different organisms results in a molecule that is "markedly different from anything occurring in nature," rendering the therapy patent eligible. 

  2. January 02, 2026

    Patent Cases To Watch In 2026

    The U.S. Supreme Court is considering whether to weigh in on generic-drug skinny labels, while the Federal Circuit is examining an effort by the U.S. Patent and Trademark Office to shield decisions from review. Here's a look at those cases and others that attorneys will be tracking in 2026.

  3. October 07, 2025

    Fed. Circ. Focuses On Breadth Of UPenn IP In Eligibility Fight

    The University of Pennsylvania and Regenxbio Inc. on Tuesday tried to persuade a Federal Circuit panel that their gene therapy patent should be revived, but at least one judge repeatedly said it's too broad.

  4. September 30, 2025

    4 Federal Circuit Clashes To Watch In October

    The Federal Circuit will hear arguments next week in cases where a nearly $42 million patent win for Seagen hangs in the balance due to a later post-grant review invalidity decision and where Regenxbio is seeking to undo the invalidation of its gene therapy patent for covering a natural product.