Patents by Inventor Ryuichirou Ohnishi

Ryuichirou Ohnishi 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 for preparing difluoromethane
    Patent number: 6700026
    Abstract: A method for preparing difluoromethane (CF2H2, HFC-32) by the use of reaction of dichlorodifluoromethane (CF2Cl2, CFC-12) and/or monochlorodifluoromethane (CF2ClH, HCFC-22) with hydrogen in the presence of a palladium-based catalyst can give difluoromethane at a high conversion and a high selectivity.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: March 2, 2004
    Assignee: Daikin Industries Ltd.
    Inventors: Masaru Ichikawa, Ryuichirou Ohnishi