There and back again

Xitronix Corp. alleged that KLA-Tencor Corp. violated the antitrust laws by fraudulently obtaining a patent from the U.S. Patent and Trademark Office. The trial court granted summary judgment to KLA, appeal was taken to the Federal Circuit, which then transferred the appeal to the Fifth Circuit – who then transferred the case back to the Federal Circuit in Xitronix Corp. v. KLA-Tencor Corp. Distinguishing the recent Supreme Court case about an attorney malpractice claim involving patent law, Gunn v. Minton, 133 S.Ct. 1059 (2013), the Fifth Circuit observed:

“This case concerns a patent that is currently valid and enforceable, issued following a PTO proceeding heretofore viewed as lawful. This litigation has the potential to render that patent effectively unenforceable and to declare the PTO proceeding tainted by illegality. This alone distinguishes the present case from Gunn. The adjudication of this Walker Process claim also implicates the interaction between the PTO and Article III courts. The district court’s acerbic statements about the PTO at summary judgment point to the complexity of relations between proceedings in federal court and before the PTO.”

No. 18-50114 (Feb. 15, 2019).