Purdue Pharma LP et al. v. Collegium Pharmaceutical, Inc. (17-cv-11814).

Purdue asserts that Collegium infringes U.S. Patent No. 9,693,961, which covers improved oxycodone hydrochloride compositions, both by filing an NDA and by making and selling the now-approved Xtampza® ER oxycodone extended release capsules.  This marks the latest in a series of lawsuits filed by Purdue alleging Xtampza® infringes Purdue patents.

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