Patents by Inventor Kenzo Shirayama

Kenzo Shirayama 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).

  • Components of uranium enrichment plant
    Patent number: 4256856
    Abstract: A cross-linked product of ethylene-hexafluoropropylene copolymer is a good elastic material and has excellent resistance to attack by uranium hexafluoride even at a high temperature. Components made of said copolymer exhibit surprisingly long life, when used in a uranium enrichment plant.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: March 17, 1981
    Assignees: Japan Atomic Energy Research Institute, Sugimoto Chemical Co. Ltd.
    Inventors: Masayuki Ito, Giro Okamoto, Sueo Machi, Kenzo Shirayama
  • Polyolefin composition and process for preparing the same
    Patent number: 4031062
    Abstract: A polyolefin composition having high adhesive strength comprising a reaction product of (1) a crystalline polyolefin, (2) at least one compound selected from the group consisting of unsaturated aliphatic carboxylic acids and anhydrides thereof and (3) magnesium oxide, and a process for preparing the polyolefin composition are disclosed.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: June 21, 1977
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kenzo Shirayama, Shinichiro Kita, Masanori Fujimoto