Patents by Inventor John C. Hoppe

John C. Hoppe 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).

  • Photographic support comprising polymerized propylene, talc, titanium dioxide, elastomer and antioxidant
    Patent number: 3973963
    Abstract: Compositions are provided comprising a film-forming crystalline polypropylene, crystalline block copolymer of propylene and at least one other .alpha.-monoolefin selected from the group of ethylene and .alpha.-monoolefin hydrocarbons of 4 to 10 carbon atoms or mixtures of the block copolymer and the polypropylene, having incorporated therein about 15 to 40% by weight talc, 5 to 15% by weight titanium dioxide pigment, 5 to 20% of an elastomer and one-tenth to 1% by weight of a polyolefin antioxidant.The films or sheets prepared from these polyolefin compositions have the stiffness, opacity and printability normally associated with paper and provide excellent replacements for paper used in photographic elements. In addition, they have excellent tear strength and elongation.
    Type: Grant
    Filed: October 1, 1974
    Date of Patent: August 10, 1976
    Assignee: Eastman Kodak Company
    Inventors: William J. Venor, John C. Hoppe, William W. Blount, Jr.