Mylan Pharmaceuticals Inc. v. Research Corporation Technologies, Inc., No. 17-2088 (Fed. Cir. 2019)Annotate this Case
RCT owns the 551 patent, which discloses and claims enantiomeric compounds and pharmaceutical compositions useful in the treatment of epilepsy and other central nervous system disorders. The Patent and Trademark Office Patent Trial and Appeal Board, in an inter partes review, concluded that claims 1–13 of the patent are not unpatentable. The Federal Circuit affirmed, rejecting an argument that an ordinary artisan would have recognized the methoxyamino group in compound 3l (disclosed in a prior reference) to be uncommon and to have potential synthetic and stability problems and that a person of skill in the art would then have been motivated to modify compound 3l by replacing the amine of its methoxyamino group with a methylene link to yield a more stable, synthetically accessible, pharmaceutically common and acceptable moiety. The Board’s findings are supported by substantial evidence. Even if a person of skill in the art would have been motivated to modify compound 3l, the evidence suggests that compounds without a methoxyamino or nitrogen-containing group at the αcarbon had reduced activity.