The U.S. Court of Appeals for the Federal Circuit today denied rehearing and rehearing en banc to Biogen International, which had petitioned the court following a November decision  affirming a district court ruling that Biogen’s patent for a method of treating multiple sclerosis (MS) was invalid for lack of written description. Three judges split from the majority, with Judges Lourie, Moore and Newman dissenting on the denial of en banc rehearing. Judge O’Malley had dissented from the November panel decision, but she retired on March 11, 2022, and only participated in the decision on panel rehearing.

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