Patent Appeal No. 6581. July 6, 1960 Cushman, Darby Cushman, Washington, D.C. (Richard G. Kline, Washington, D.C., of counsel), for appellant. Clarence W. Moore, Washington, D.C., for the Commissioner of Patents. Before WORLEY, Chief Judge, and RICH, MARTIN, and SMITH, Judges, and Judge WILLIAM H. KIRKPATRICK. United States Senior Judge for the Eastern District of Pennsylvania, designated to participate in place of Judge O'Connell, pursuant to provisions of Section 294(d), Title 28 United States