Patents by Inventor Leo S. Burnett

Leo S. Burnett 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).

  • Photosensitive diazo steel lithoplate structure
    Patent number: 3958994
    Abstract: A lithographic printing plate structure and method of manufacture, in which a support sheet of steel, normally subject to corrosion in a lithographic environment, such as a mild steel, is coated, preferably on both sides, with aluminum, zinc or an aluminum-zinc alloy to a thickness of about 1 to 3 mils, a polyvinyl phosphonic acid is disposed on the metal coating and a negative working diazo photo-sensitive layer is applied over the polyvinyl phosphonic acid coating.
    Type: Grant
    Filed: August 26, 1974
    Date of Patent: May 25, 1976
    Assignee: American Hoechst Corporation
    Inventor: Leo S. Burnett