In a sealed opinion, the U.S. Court of Appeals for the Federal Circuit vacated and remanded a case in which ArcelorMittal had sought to revive a patent infringement suit against AK Steel.
The dispute, which dates back to 2013, is over high-strength steel used by automobile manufacturers.
The trial court had ruled there was no infringement by West Chester, Ohio-based AK Steel Corp. Luxembourg-based Arcelor Mittal appealed.
ArcelorMittal told the court in March that AK Steel ’s representations to car manufacturers about uses for its steel products make it liable for patent infringement.
ArcelorMittal Atlantique et v. AK Steel Corporation, Fed. Cir., 17-01637, opinion 11/5/18