Tag: Prosecution History Estoppel

The Federal Circuit’s decision in Actelion Pharmaceuticals Ltd. v. Mylan Pharmaceuticals Inc., Case No. 24-1641 (Fed. Cir. May 13, 2026), provides an important reminder that scientific terminology in patent claims is not interpreted in a vacuum. Even seemingly straightforward numerical limitations can become highly contextual when industry standards, measurement conventions, and prosecution history intersect. In…