Purdue Pharma's Ultram Patents Deemed Invalid

Law360, New York (August 17, 2009, 5:55 PM EDT) -- A federal judge has ruled that two Purdue Pharma LP patents for painkiller Ultram ER are invalid, clearing the way for generic-drug maker Par Pharmaceuticals Inc. to make its own version of the drug.

Judge Kent A. Jordan of the U.S. District Court for the District of Delaware determined Friday that the patents were infringed, but that they were invalid due to obviousness.

The judge rejected arguments that the patents were unenforceable for inequitable conduct, however.

Prior art for the drug, known under the scientific name...
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