In Biogen International GmbH v. Banner Life Sciences LLC, a panel of the U.S. Court of Appeals for the Federal Circuit (CAFC) held that the scope of a patent term restoration under 35 U.S.C. §156 only includes the active ingredient of an approved product (in this case, dimethyl fumarate or DMF, the active ingredient in Biogen’s Tecfidera®) or an ester or salt of that active ingredient....
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