Patents by Inventor Masamitu Inomata

Masamitu Inomata 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 producing norcamphane dicarbonitriles
    Patent number: 5169971
    Abstract: The present invention relates to the production of a norcamphane dicarbonitrile and is directed to solving the problems of low conversion from the starting material, low selectivity and uneconomical production.According to the present invention, a norcamphane dicarbonitrile is produced by hydrocyanation of bicyclo [2,2,1]-5-heptene-2-carbonitrile in the presence of a zero-valent nickel complex catalyst and a Lewis acid.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: December 8, 1992
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masamitu Inomata, Naokazu Shiotani, Kazuo Koshizuka, Minato Karasawa
  • Process for producing norcamphane dicarbonitriles
    Patent number: 5087722
    Abstract: A norcamphane dicarbonitrile is produced by hydrocyanation of bicyclo [2,2,1]-5-heptene-2-carbonitrile in the presence of a zerovalent nickel complex catalyst and Lewis acid and treating the resulting crude product by contact with a catalyst treating agent.
    Type: Grant
    Filed: October 3, 1990
    Date of Patent: February 11, 1992
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Masamitu Inomata, Naokazu Shiotani, Kazuo Koshizuka, Minato Karasawa