Patents by Inventor Yasuhiko Hirai

Yasuhiko Hirai 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).

  • Process for preparation of perfluoro organic compounds
    Patent number: 4983747
    Abstract: Disclosed is a process for the preparation of a perfluoroorganic compound, which comprises fluorinating a partially fluorinated or unfluorinated organic compound having carbon-to-fluorine bonds under mild conditions and then, contacting the resulting reaction mixture with a fluorine gas at a temperature of 110.degree. to 180.degree. C.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: January 8, 1991
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Masakatsu Nishimura, Naoya Okada, Yasuo Murata, Yasuhiko Hirai
  • Process for preparation of perfluoro organic compounds
    Patent number: 4929317
    Abstract: Disclosed is a process for the preparation of a perfluoro organic compound, which comprises fluorinating a partially fluorinated or unfluorinated organic compound having carbon-to-fluorine bonds under mild conditions and then, contacting the resulting reaction mixture with a fluorine gas at a temperature of 110.degree. to 180.degree. C.
    Type: Grant
    Filed: December 1, 1987
    Date of Patent: May 29, 1990
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Masakatsu Nishimura, Naoya Okada, Yasuo Murata, Yasuhiko Hirai