An antibody can take various forms, including the following: a monoclonal, polyclonal, mouse, human, humanized, monospecific, bispecific, glycosylated (sugar chain-modified), Fc-modified, or ADC (antibody-drug conjugate) antibody; an antibody fragment (e.g., Fab, scFv, diabody, sdAb, tandem scFv); or an antibody of different class or subclass (e.g., IgG (e.g., IgG1, IgG2, IgG3, IgG4), IgM, IgE, IgA). If claim 1 recites an “antibody”, whether or not the antibody includes each of the above forms can be an issue in an infringement lawsuit. In Baxalta Inc. v. Genentech, Inc. (Fed. Cir. 2020), Baxalta alleged that Genentech’s Hemlibra® (emicizumb-kxwh) product infringed its U.S. Patent No. 7,033,590 (’590 patent). In this lawsuit, the issue was whether or not the “antibody or antibody fragment thereof” in claim 1 of the ‘590 patent should comprise a bispecific antibody (the form of Hemlibra).
Recent Posts
- Call Off Chicken Little: The Sky is Not Falling for Skinny Labeling After GSK v. Teva
- CAFC Committee Recommends Another Year of Sanctions Against Newman
- Massie Tells House IP Subcommittee Witnesses He’s ‘Appalled’ By Proposals to Rein in ITC’s Patent Powers
- CAFC Invalidates Remaining Claim on Data Transmission Patent, Remands Substitute Claims for Collateral Estoppel Determination
- NIH Intramural Licensing Guidelines Hit the Wrong Note at the Wrong Time