Kennametal, Inc. v. Ingersoll Cutting Tool Co., No. 14-1350 (Fed. Cir. 2015)Annotate this Case
Kennametal’s 519 patent was filed in 2004 and issued in 2007. It relates to cutting tools containing ruthenium as a binder that are coated using physical vapor deposition. After being sued for infringement, Ingersoll successfully petitioned the Patent and Trademark Office for inter partes reexamination of the 519 patent. The district court stayed the litigation. The Patent Trial and Appeal Board entered a new anticipation ground of rejection against certain of claims and affirmed the Examiner’s obviousness rejection of certain remaining claims. The Federal Circuit affirmed. Substantial evidence supported the determinations of anticipation and obviousness.