FOSTER CITY, Calif.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) today announced that the U.S. Patent & Trademark Office (PTO) has completed the second of four reexamination proceedings and has confirmed the patentability of U.S. Patent No. 5,922,695, which covers the composition of matter for Viread (tenofovir disoproxil fumarate). On May 20, Gilead announced that the U.S. PTO confirmed the patentability of U.S. Patent No. 6,043,230.
