Patent Appeal No. 6719. July 25, 1962. J. Hart Evans, Louis C. Smith, Jr., New York City, and Paul A. Rose, Washington D.C., for appellants. Clarence W. Moore, Washington, D.C. (Joseph Schimmel, Washington, D.C., of counsel), for the Commissioner of Patents. Before WORLEY, Chief Judge, RICH, MARTIN, and SMITH, Judges, and Judge WILLIAM H. KIRKPATRICK. United States Senior District Judge for the Eastern District of Pennsylvania, designated to participate in place of Judge O'CONNELL, pursuant to provisions