Patent Appeal No. 7833. December 14, 1967. Greene, Callmann Durr, Frank L. Durr, New York City, Stanley H. Leiberstein, Nutley, N.J., for appellant. Joseph Schimmel, Washington, D.C. (Raymond E. Martin, Washington, D.C., of counsel), for the Commissioner of Patents. Before WORLEY, Chief Judge, RICH, SMITH and ALMOND, Associate Judges, and WILLIAM H. KIRKPATRICK. Senior District Judge, Eastern District of Pennsylvania, sitting by designation. SMITH, Judge. The sole issue to be determined in this appeal