Patents by Inventor Haruo Hatakeyama

Haruo Hatakeyama 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).

  • Composite film having slippery, electrically conducting surface
    Patent number: 5262219
    Abstract: A composite film is disclosed which includes (a) a synthetic resin substrate film having a roughened surface, and (b) a thin, slippery, electrically conducting layer coated over the roughened surface. The conducting layer contains 2-10% by weight of carbon black, 10-40% by weight of a fluorine resin, 25-78% by weight of a hardened binder resin selected from hardened amino resins, hardened phenol resins and mixtures thereof, and 7-25% by weight of a modifying resin selected from polyurethane resins, acrylic resins, polyester resins and mixtures thereof, the total amount of the hardened binder resin and the modifying resin being 50-85% by weight.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: November 16, 1993
    Assignee: Somar Corporation
    Inventors: Shinichi Yamamoto, Masatoshi Tomiki, Haruo Hatakeyama