Gilead Sciences Inc., the world’s largest maker of HIV medicines, sued Merck & Co. seeking a court order that the experimental hepatitis C drug sofosbuvir won’t infringe patents.
Merck, which sold $502 million of its Victrelis hepatitis C drug last year, contacted Gilead this month requesting it license two patents Merck says are related to sofosbuvir, Gilead’s attorneys said a complaint filed yesterday in federal court in San Francisco.
Merck, based in Whitehouse Station, New Jersey, asked Gilead to pay a 10 percent royalty on the net sales of the medicine until the patents expire, a request “meant to threaten Gilead” on the eve of U.S. regulatory approval of sofosbuvir, according to the complaint. Gilead seeks a judge’s declarations that the patents aren’t enforceable or infringed so it won’t have to license them to sell the medicine.
Gilead, based in Foster City California, said June 7 that sofosbuvir will receive a priority marketing review by U.S. regulators with a target review date of Dec. 8.
Hepatitis C attacks the liver and can lead to liver cancer. The virus affects about 150 million people worldwide and the market for new pills such as sofosbuvir is estimated at $20 billion.
Lainie Keller, a Merck spokeswoman, didn’t immediately respond to an e-mail yesterday after regular business hours seeking comment on the lawsuit.
The case is Gilead Sciences v. Merck, 13-04057, U.S. District Court, Northern District of California (San Francisco).