Citation Codes Equivalent Citations citation codes Docket Number 2019-1749, 2019-1777 See more information ... Smart Summary Please sign up to generate summary. IMMUNEX CORPORATION, Appellant v. SANOFI-AVENTIS U.S. LLC, Genzyme Corporation, Regeneron Pharmaceuticals, Inc., Cross-Appellants Andrei Iancu, Under Secretary of Commerce for Intellectual Property and Director of the United States Patent Trademark Office, Intervenor Not Found