WASHINGTON, D.C. - The Federal Circuit U.S. Court of Appeals on March 14 revisited and, acting sua sponte en banc, vacated its 2006 ruling in Zoltek Corp. v. United States (442 F.3d 1345 $(Fed. Cir. 2006$)) (Zoltek III), in what it deemed "the continuing saga" of an inventor's patent infringement case against the U.S. government (The Zoltek Corporation v. Lockheed Martin Corporation, No. 09-5135, Fed. Cir.; 2012 U.S. App. LEXIS 5361).