Gasper J. LaRosa

Specialty / focus. Gasper J. LaRosa is a pharmaceutical and biotechnology patent litigator with more than 20 years' experience, per his Jones Day bio. His practice centers on Hatch-Waxman (ANDA) and biosimilar (BPCIA) litigation, plus district court, ITC Section 337, and USPTO post-grant work, spanning small-molecule drugs (e.g., OxyContin®, Tagrisso®, Revlimid®, Androgel®), drug-delivery systems, biologics (conjugate vaccines), medical devices, chemical manufacturing processes, and battery technology. He holds a B.S. in chemical engineering (Rensselaer Polytechnic Institute, 1995), consistent with that technical focus.

Side / firm context. The tracked docket data shows a single appearance — plaintiff-side, as key litigation counsel for BioMarin at Jones Day — and web-available records indicate he consistently represents innovator/patent-owner operating companies (BioMarin, Purdue Pharma) enforcing or defending their own drug patents, rather than NPE/PAE prosecution or operating-company defense. He is a partner in Jones Day's New York office; prior firm history includes Kaye Scholer LLP (later Arnold & Porter Kaye Scholer), per court filings and directory data. He was appearing as lead/backup counsel at Jones Day in PTAB matters by 2018.

Notable matters / PTAB. LaRosa is counsel for BioMarin in the Voxzogo® (CNP) dispute with Ascendis Pharma — including ITC Inv. No. 337-TA-1447, parallel N.D. Cal. litigation (4:25-cv-05696), and the Federal Circuit appeal Ascendis Pharma A/S v. BioMarin Pharmaceutical Inc. (Fed. Cir. No. 26-1026, decided March 26, 2026), in which BioMarin prevailed on the § 1659(a)(2) mandatory-stay question and LaRosa appeared on the brief. He has long represented Purdue Pharma, including as lead patent-owner counsel in PTAB trials (e.g., PGR2018-00048; IPR2018-00625 and -00717) and in district court enforcement litigation such as Purdue Pharmaceuticals L.P. v. Collegium Pharmaceutical, Inc. His PTAB/IPR experience is substantial and recurring, and he is a member of the PTAB Bar Association and Federal Circuit Bar Association.

Bar / education. Admitted New York (2002); registered to practice before the USPTO; barred before the Federal Circuit, S.D.N.Y., and U.S. Supreme Court; J.D., St. John's University School of Law (2001). (Sources: Jones Day attorney bio; Federal Circuit opinion in Ascendis v. BioMarin, No. 26-1026; USPTO/PTAB filings; CourtListener docket entries; Super Lawyers and Martindale profiles.)