Patents by Inventor Mihaya Matsukawa

Mihaya Matsukawa 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).

  • Preparation process of N-substituted monochlorosuccinimides
    Patent number: 4970323
    Abstract: N-substituted monochlorosuccinimides e.g., N-phenylmonochlorosuccinimide, can be prepared in a high yield by reacting a maleamic acid, e.g., N-phenylmaleamic acid, with phosgene in the presence of a catalyst, e.g., dimethylformamide.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: November 13, 1990
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Mihaya Matsukawa, Masaru Wada, Hiroshi Suizu, Masayuki Furuya, Teruyuki Nagata