Patents by Inventor Sachio Yasufuku

Sachio Yasufuku 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 of improving anti-inflammability of dimethyl silicone oil for use in static electric apparatus
    Patent number: 4431579
    Abstract: The anti-inflammability of dimethyl silicone oil for use in static electric apparatuses is improved by reacting the dimethyl silicone oil with a cerium chelate compound so as to bind thereto a predetermined amount of the cerium chelate compound. This binding suppresses the generation of the cyclic oligomer components to be produced by the decomposition of dimethyl silicone oil, thereby elevating the flash point of the dimethyl silicone oil.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: February 14, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Sachio Yasufuku
  • Linear phenylmethylsilicone oil as dielectric for stationary electric device
    Patent number: 3980803
    Abstract: A stationary electric device such as, for example, a capacitor and a transformer, using linear phenylmethylsilicone oil as an impregnating oil is provided. The use of linear phenylmethylsilicone oil improves an anti-corona property as well as permits the miniaturization of the device.
    Type: Grant
    Filed: September 30, 1974
    Date of Patent: September 14, 1976
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventors: Sachio Yasufuku, Yasuaki Ishioka, Takeshi Tanii, Sigeo Nakayama