Patents by Inventor Hitoharu Ishizuka

Hitoharu Ishizuka 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).

  • Method for producing fiber reinforced plastic rods having helical ribs
    Patent number: 5182064
    Abstract: A method for producing a fiber reinforced plastic rod having ribs on its surface by impregnating a reinforcing material which has continuous long fiber bundles with an uncured liquid resin. A rib forming member is separately prepared by impregnating a fiber bundle reinforcing material with an uncured liquid resin. A fiber reinforced plastic rod is formed by helically applying the rib forming member to the surface of the substrate forming member and together curing the two members into an integral body. A fiber reinforced plastic rod, prepared in accordance with this method, is also described.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: January 26, 1993
    Assignee: Nippon Petrochemicals Company, Limited
    Inventors: Hitoharu Ishizuka, Reiko Kubo