Patents by Inventor Herbert R. Liss

Herbert R. Liss has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Wear resistant titanium alloy coating
    Patent number: 4236940
    Abstract: The adherence and wear resistance of chromium alloy electroplates on titanium is improved by pretreating the substrate to form a chromium conversion coating, and post-treating the substrate at a temperature at about 700-820.degree. C. (1300-1500.degree. F.) for about 1-300 hours. The pretreatment is comprised of the formation of a chromium conversion coating from an acid chromate solution; a preferred solution is comprised of hydrofluoric acid, sodium chromate, and water. The post treatment causes diffusion sufficient to obtain a bond but avoids completely interdiffusing the chromium alloy electroplate, to preserve the wear resistance of the electroplate surface.
    Type: Grant
    Filed: June 12, 1979
    Date of Patent: December 2, 1980
    Assignee: United Technologies Corporation
    Inventors: Brian A. Manty, Herbert R. Liss, Henry Lada