Patents by Inventor Kazutaka Watabe

Kazutaka Watabe 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).

  • Magnesia cement composition, process of its manufacture, and composite comprising same
    Patent number: 4003752
    Abstract: A magnesia cement composition comprising active magnesia, magnesium sulfate, and pulp or a mixture of pulp and fibrous glass. When hardened, this composition yields a crack-free low-shrinkage material. Valuable composite boards are obtained by lamination from the hardened composition and core materials such as cellular concrete, plywood, plastic foam, gypsum plaster board, and cemented excelsior board.
    Type: Grant
    Filed: May 20, 1975
    Date of Patent: January 18, 1977
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Susumu Isohata, Kazutaka Watabe, Morio Shimoshimizu, Toshiyuki Iwaisako