OSI Pharmaceuticals Decision Has Limited Use in Supporting Patentability of Method of Treatment Claims
Earlier this month, Mallinckrodt succeeded in its inter partes review (IPR) challenge against patent owner Biovie, Inc. (Biovie). The Patent Trial and Appeal Board’s (PTAB’s) final determination held that all claims of Biovie’s U.S. Patent No. 9,655,945 (the ‘945 patent) were unpatentable. The claims of Biovie’s ‘945 patent, directed to administering terlipressin to ascites (abnormal buildup of fluid in the abdomen) patients, were deemed anticipated and/or obvious over the prior art. During the IPR, Biovie attempted to use the recent Federal Circuit decision from OSI Pharmaceuticals v. Apotex (OSI) as a shield to patentability, but the shield was unsuccessful. As such, OSI is unlikely to be a cure-all for pharmaceutical method of treatment claims, in IPR proceedings or otherwise.