Patents by Inventor Henry J. Wittrock

Henry J. Wittrock 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).

  • Anodizing pretreatment for nickel plating
    Patent number: 3943039
    Abstract: This invention relates to a process of pretreating an aluminum surface for subsequent nickel plating to provide improved adhesion and corrosion resistance. The pretreatment process comprises subjecting the aluminum surface to anodizing in a phosphoric acid electrolyte in such a manner so that the voltage is increased to operating levels within 30 seconds, preferably in less than 15 seconds.
    Type: Grant
    Filed: October 8, 1974
    Date of Patent: March 9, 1976
    Assignee: Kaiser Aluminum & Chemical Corporation
    Inventor: Henry J. Wittrock