Patents by Inventor Miki Tojima

Miki Tojima 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 producing carbonic acid esters and a catalyst therefore
    Patent number: 5324700
    Abstract: Carbonic acid esters are important compounds as a gasoline extender, an octane number improver, an organic solvent and a reacting agent in place of phosgene for production of isocyanates, polycarbonates and various intermediates of agricultural chemicals and pharmaceuticals.According to the present invention, carbonic acid esters can be prepared by reacting an alcohol with carbon monoxide and oxygen in the presence of a catalyst comprising a copper halide and a tertiary organophosphorus compound having phenyl group or alkyl group.
    Type: Grant
    Filed: December 31, 1992
    Date of Patent: June 28, 1994
    Assignee: JGC Corporation
    Inventors: Kenji Mori, Masao Tonosaki, Hidekazu Nakamura, Kenzo Yamamoto, Tsutomu Toida, Miki Tojima
  • Method of producing carbonic acid esters and a catalyst therefore
    Patent number: 5196561
    Abstract: Carbonic acid esters are important compounds as a gasoline extender, an octane number improver, an organic solvent and a reacting agent in place of phosgene for production of isocyanates, polycarbonates and various intermediates of agricultural chemicals and pharmaceuticals.According to the present invention, carbonic acid esters can be prepared by reacting an alcohol with carbon monoxide and oxygen in the presence of a catalyst comprising a copper halide and a tertiary organophosphorus compound having phenyl group or alkyl group.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: March 23, 1993
    Assignee: JGC Corporation
    Inventors: Kenji Mori, Masao Tonosaki, Hidekazu Nakamura, Kenzo Yamamoto, Tsutomu Toida, Miki Tojima