AK Steel Prevails Again in Patent Infringement Litigation with ArcelorMittal

WEST CHESTER, Ohio, Oct. 29, 2013 /PRNewswire/ -- AK Steel (NYSE: AKS) said today that the United States District Court for the District of Delaware again confirmed that the company's ULTRALUME® advanced high-strength steel product does not infringe upon an ArcelorMittal...