Patents by Inventor Stefan Heimrich

Stefan Heimrich 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 a corrosion-resistant coating on the surface of lacquered workpieces
    Patent number: 4956196
    Abstract: In a method and in an apparatus for the production of a corrosion-resistant coating of high reflectivity on the surface of workpieces, especially reflector inserts formed from plastic, in a vacuum chamber with a glow-discharge cathode and an evaporator, there is deposited on a coating consisting of a protective lacquer a second coating of a polymer, preferably of hexadimethylsilane, then a third coating of a metal, preferably aluminum, and lastly a fourth coating of a polymer, preferably of hexadimethylsilane. Both the metal evaporation and the polymerization of the protective coatings on the reflective coating and on the lacquer coating are performed in the same vacuum chamber.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: September 11, 1990
    Assignee: Leybold Aktiengesellschaft
    Inventors: Wolfgang Wagner, Klemens Ruebsam, Helmut Kubik, Stefan Heimrich, Klaus Eckert, Werner Pflueger