Patents by Inventor Keizo Ichii

Keizo Ichii 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).

  • Screw type extruding or kneading machine and screw used therein
    Patent number: 4746220
    Abstract: The outer periphery of a screw and the inside of a barrel of a screw type extruding or kneading machine are made of ceramics, to improve the abrasion and heat resistances thereof, so that the screw and the barrel will operate for a longer life time even if a hard material or a material containing a hard material is worked.
    Type: Grant
    Filed: April 15, 1986
    Date of Patent: May 24, 1988
    Assignees: Noritake Co., Limited, Mitsubishi Rayon Engineering Co., Ltd.
    Inventors: Kiyoshi Sukai, Keizo Ichii, Shigeru Takane, Takayuki Yoshikawa, Hiroshi Inada, Takao Yamada