Indivior's Suboxone Patent Fight Faces Wary Fed. Circ.

By Khorri Atkinson (September 1, 2021, 6:20 PM EDT) -- Indivior UK Ltd.'s bid to revive a patent fight with India-based generic-drug maker Dr. Reddy's Laboratories over its opioid addiction treatment Suboxone appeared to be on shaky ground after two Federal Circuit judges on Wednesday seemed to agree with the Patent Trial and Appeal Board that Invidior's patent needs to disclose more than it did.

The board in June 2020 invalidated certain claims in Indivior's U.S. Patent No. 9,687,454 after finding that the claimed invention does not expressly disclose its polymer weight percentage ranges—the percent by weight of the total amount of polymer in a dosage of Suboxone film. But Covington & Burling...

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