Baxalta Inc. v. Genentech, Inc., No. 19-1527 (Fed. Cir. 2020)Annotate this Case
Baxalta sued Genentech, asserting that Genentech’s Hemlibra® product used to treat the blood clotting disorder hemophilia infringes claims of its 590 patent. The 590 patent relates to preparations used to treat hemophilia patients who have developed factor VIII inhibitors. After the district court issued a claim construction order, construing the terms “antibody” and “antibody fragment,” the parties stipulated to non-infringement of the asserted claims. The Federal Circuit vacated, finding that the district court erred in construing the terms by selecting a narrower construction, which is inconsistent with the written description and the plain language of the claim.