Patents by Inventor Herbert Appl

Herbert Appl 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).

  • Valve metal/platinum composite electrode
    Patent number: 4995550
    Abstract: A composite electrode based on a valve metal with a layer of a platinum foil securely adhering thereto is produced by hot isostatic pressing of the valve metal base and platinum foil between separating sheets; the separating sheet which comes in contact with the platinum foil during hot isostatic pressing is a metal with a melting point of at least 100.degree. C. above the hot isostatic pressing temperature.
    Type: Grant
    Filed: July 13, 1989
    Date of Patent: February 26, 1991
    Assignee: Peroxid-Chemie GmbH
    Inventors: Herbert Appl, Michael Gnann, Wolfgang Jahr, Erwin Rossberger