Last week, the Federal Circuit affirmed a lower court’s dismissal of AbbVie’s complaint seeking declaratory judgment of invalidity of U.S. Patent No. 6,248,516 (“the ’516 patent”) owned by Astra Zeneca subsidiary MedImmune.  AbbVie brought this declaratory judgment action in June 2016 in the hopes of ending its royalty obligations to MedImmune.

The Fed. Circuit’s decision