Patents by Inventor Wilhelm Schwedes

Wilhelm Schwedes 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 and arrangement for coating orifice walls
    Patent number: 4389430
    Abstract: The walls of an orifice in a board are coated by a rod or tube which touches or dips into a liquid below the board. The walls are coated either by a capillary effect or by moving the rod or tube through the orifice. Several rods and/or tubes may be attached to a single holder for coating a plurality of selected orifices simultaneously.
    Type: Grant
    Filed: November 6, 1981
    Date of Patent: June 21, 1983
    Assignee: Licentia Patent-Verwaltungs-GmbH
    Inventors: Renate Rettich, Wilhelm Schwedes
  • Method for producing a pigment coating
    Patent number: 4243698
    Abstract: A method is disclosed for producing a pigment coating on a substrate. A hardenable polymer coating is initially provided on the substrate, followed by an excess of hardening agent. This produces a first hardened coating with sufficient hardening agent remaining to harden a second polymer coating, containing suspended pigment, which is deposited on top of the first coating. The polymer is then pyrolyzed, leaving a coating of pigment on the substrate.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: January 6, 1981
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Otto Marzel, Wilhelm Schwedes, Alfred Wilhelm