Patents by Inventor Leo Preuss

Leo Preuss 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).

  • Process for enamelling aluminum-coated steel plate and enamelled steel plate
    Patent number: 5266357
    Abstract: A process is disclosed for enamelling an aluminum-coated steel plate using a novel enamel slip. The enamel slip contains low-melting enamel frit, a high melting inorganic oxidic powder, and an oxide of copper or iron.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: November 30, 1993
    Assignee: Email Brugge N.V.
    Inventors: Leo Preuss, Hans Hoffmann