Patents by Inventor Josef Stuke

Josef Stuke 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).

  • Method for producing an electrophotographic recording material having dual layer of amorphous and crystallized Se
    Patent number: 4343883
    Abstract: In a method for producing an electrophotographic recording material composed of a dual layer of amorphous and crystallized selenium applied to an electrically conductive substrate, tellurium is vapor-deposited in a vacuum onto the surface of the conductive substrate to a layer thickness of about 0.5 to about 5 nanometers to form a tellurium layer, and selenium is vapor-deposited onto the tellurium layer to a layer thickness of about 20 to about 100 microns to form the dual layer of amorphous and crystallized selenium.
    Type: Grant
    Filed: December 30, 1980
    Date of Patent: August 10, 1982
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Karl-Heinz Kassel, Manfred Lutz, Josef Stuke, Hubert Walsdorfer
  • Tellurium layer allows vapor deposition of crystalline selenium thereon in making double layer electrophotographic record material
    Patent number: 4298671
    Abstract: In a process for producing an electrophotographic recording material composed of a double layer of amorphous and crystallized selenium on an electrically conductive carrier, a layer of tellurium having a thickness of 10 to 500 nm is applied onto the surface of the carrier, and selenium is then vapor-deposited onto the tellurium layer to a thickness of 20 to 100.mu. to form the double layer.
    Type: Grant
    Filed: February 16, 1979
    Date of Patent: November 3, 1981
    Assignee: Licentia Patent-Verwaltung-G.m.b.H.
    Inventors: Karl-Heinz Kassel, Manfred Lutz, Josef Stuke, Hubert Walsdorfer