US pharma cos sue Lupin for patent infringement

Posted on February 9 2010 by admin

US-based Purdue Pharma Products LP and UK-based Napp Pharmaceutical Group have sued Lupin Ltd and its US subsidiary, Lupin Pharma Inc, claiming that their attempt to manufacture and market the generic version of the analgesic tramadol ER (brandname-Ultram ER) infringes patent coverage of the innovator. Purdue has alleged that Lupin, by filing an abbreviated new drug application with the US Food and Drug Administration and by seeking an approval to manufacture and market tramadol hydrochloride controlled-release tablets of strength-100 mg, 200 mg and 300 mg, has violated patent numbers 887 and 430. The acts of infringement by Lupin set forth …

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