Patents by Inventor Ken Nakai

Ken Nakai 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).

  • Refractory for continuous casting
    Patent number: 4640336
    Abstract: A silicon aluminum oxynitride containing refractory for use in continuous casting is placed between a mold and a tundish and is formed by sintering an admixture of silicon nitride (Si.sub.3 N.sub.4), aluminum nitride (AlN), boron nitride(BN), and a mineral clay. The refractory further includes aluminum oxide(Al.sub.2 O.sub.3).
    Type: Grant
    Filed: September 24, 1985
    Date of Patent: February 3, 1987
    Assignees: Toshiba Ceramics Co., Ltd., Sumitomo Metal Industries, Ltd.
    Inventors: Kazumi Arakawa, Toshiyuki Hirao, Kenji Sugiura, Satoshi Kuroki, Sei Hiraki, Takao Suzuki, Ken Nakai
  • Shoulder patting means
    Patent number: 4532919
    Abstract: Shoulder patting device comprising a grip stick, two resilient plates which extend from one end of the grip stick in the form of Y-shape and first and second tip members which are respectively secured to the tips of the resilient plates.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: August 6, 1985
    Assignee: Aisen Kogyo, Ltd.
    Inventors: Shoji Iwahashi, Ken Nakai