Patents by Inventor Toshimasa Fukuzawa

Toshimasa Fukuzawa 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).

  • Incombustible azeotropic like solvent compositions
    Patent number: 5047176
    Abstract: Incombustible azeotropic like solvent compositions comprising 87 to 92 parts by weight of 1,1,2-trichloro-1,2,2-trifluoroethane and 8 to 13 parts by weight of hydrocarbons, said hydrocarbons have a boiling point of 49.degree. to 58.degree. C.
    Type: Grant
    Filed: December 23, 1988
    Date of Patent: September 10, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Kohji Tamura, Yukio Omure, Satoshi Ide, Naoyoshi Hanatani, Toshimasa Fukuzawa
  • Azeotropic solvent composition
    Patent number: 4973421
    Abstract: An azeotropic solvent composition which comprises an azeotropic mixture of 77% by weight of Flon-113 and 23% by weight of cyclopentane. The composition can decrease the amount of 1,1,2-trichloro-1,2,2-trifluoroethane excellent in power for dissolving fats and oil, grease, and particularly, waxes used for temporarily fixing silicon wafers, quartz, ceramics without erosion of materials made of plastics and rubbers, and it is easy to control the liquid composition and easy to recover and reuse the composition.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: November 27, 1990
    Assignee: Daikin Industries, Ltd.
    Inventors: Kohji Tamura, Yukio Omure, Satoshi Ide, Naoyoshi Hanatani, Toshimasa Fukuzawa