Patents by Inventor Rolf Dheim

Rolf Dheim 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).

  • Dye acceptor element for thermosublimation printing
    Patent number: 5310719
    Abstract: Dye transfers of high color density, excellent sharpness and good stability are obtained in thermosublimation printing using a dye acceptor layer consisting essentially of a polyurethane formed by crosslinking and characterized in that the polyurethane contains at least 5% by weight urethane groups (--O--CO--NH--).
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: May 10, 1994
    Assignee: AGFA-Gevaert AG
    Inventors: Rolf Wehrmann, Geert Defieuw, Emil Verdonck, Herman Uytterhoeven, Rolf Dheim, Walter Schafer
  • Stabilizer mixtures
    Patent number: 4102859
    Abstract: The present invention teaches mixtures of neutral esters of phosphorous acid with oxetane compounds and plastics stabilized by the incorporation of said mixtures. The present invention teaches a method of improving the retention of light transmission in plastics, particularly polycarbonate, by the incorporation therein of mixtures of neutral esters of phosphorous acid and oxetane compounds in which there are 2 to 10 oxetane groups per phosphorus atom.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: July 25, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Erich Eimers, Rolf Dheim, Wolfgang Cohnen