Patents by Inventor Walter von Wirth

Walter von Wirth 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).

  • Recording material for electrostatic or electrographic recordings
    Patent number: 6096415
    Abstract: Electrostatic or electrographic recording material comprising a microporous synthetic thermoplastic polymer as a sheet-like base material, having a content of at least 20 wt %, based on the total weight of the base material, of finely dispersed inorganic fillers and comprising an electrically conductive layer arranged on at least one surface of said base material, and a dielectric recording layer disposed on the electrically conductive layer.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: August 1, 2000
    Assignee: Sihl GmbH
    Inventors: Ralf Liebler, Walter von Wirth, Richard Lack, Frank Frings