Natco Challenges Gilead Science's Tamiflu Patent
Gilead confirmed Monday that Natco has submitted an abbreviated new drug application to the U.S. Food and Drug Administration requesting permission to manufacture and market a generic version of Tamiflu, which was invented by Gilead and licensed to F. Hoffmann-La Roche Ltd. in 1996.
Hyderabad, India-based Natco claims that the Tamiflu patent – U.S. Patent No. 5,763,483 – is invalid and unenforceable, and that it will not...
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