Purdue's Patents for Oxycontin Invalidated

Law360 (January 5, 2004, 12:00 AM EST) -- A U.S. District Court judge in Manhattan invalidated Purdue Pharma’s patents protecting the controversial and widely abused pain killer Oxycontin, clearing the way for drug maker Endo Pharmaceuticals to sell a generic version.

U.S. District Judge Sidney H. Stein ruled that while Endo infringed three of Purdue's patents on the drug, Endo "has proven by clear and convincing evidence that the patents are invalid due to Purdue's inequitable conduct before the Patent and Trademark Office during the prosecution of the patents in suit."

Purdue had sued...
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