Arcelormittal v. AK Steel Corp., No. 16-1357 (Fed. Cir. 2017)Annotate this Case
In 2010, ArcelorMittal sued (050 case), alleging infringement of the 805 patent. A jury found that Defendants did not infringe and that the asserted claims were invalid as anticipated and obvious. The Federal Circuit reversed the court’s claim construction and concluded that, as a matter of law, the claims were not anticipated. In 2013, the Patent Office reissued the 805 patent as the RE153 patent. ArcelorMittal filed the 685 and 686 infringement suits based on events occurring after the reissuance and moved to amend its 050 complaint to substitute allegations of infringement of the RE153 patent. The court entered summary judgment, finding that claims 1–23 had been improperly broadened, and denied the motion to amend as moot. The Federal Circuit affirmed the invalidity of RE 153 claims 1–23, but reversed as to claims 24 and 25. On remand, the court granted defendants summary judgment of invalidity on RE 153 claims 24 and 25, denied ArcelorMittal’s motion to dismiss the 050 case for lack of subject matter jurisdiction, and granted ArcelorMittal’s motion to amend its 685 complaint. The Federal Circuit affirmed. The district court possessed subject matter jurisdiction to grant summary judgment, properly followed the mandate on remand, and properly exercised its discretion to deny ArcelorMittal’s request for new discovery.