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Patent Invalidity OxyContin

McDermott Will & Emery

Reformulated OxyContin Patents Invalid - Purdue Pharma L.P., et al. v. Epic Pharma, LLC, et al.

Addressing product-by-process limitations and inherent anticipation issues, the US Court of Appeals for the Federal Circuit affirmed the district court’s ruling that the asserted claims of Purdue Pharma’s patents covering...more

Foley & Lardner LLP

Purdue OxyContin Patents Invalid Despite Stemming From Discovery Of Source Of Toxic Impurity

Foley & Lardner LLP on

In Purdue Pharma L.P. v. Epic Pharma LLC, the Federal Circuit affirmed the district court decision holding four OxyContin patents invalid as obvious. In so doing, the court rejected Purdue’s arguments that its discovery of...more

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