Patents by Inventor Masataka Kuroki

Masataka Kuroki 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).

  • Novel amidoxime derivatives
    Patent number: 4225721
    Abstract: Novel amidoxime derivatives having the following structural formula (IV) or (IV'): ##STR1## wherein R.sub.1 represents methyl or ethyl group and R.sub.2 represents hydrogen or methyl group, useful as a raw material for 3-amino-5-methyl isoxazole, are prepared from .beta.-amino crotonitrile. Said isoxazole, useful as an intermediate for various medicines, may be prepared without producing any by-products of isomer.
    Type: Grant
    Filed: September 21, 1978
    Date of Patent: September 30, 1980
    Assignee: Sogo Pharmaceutical Company, Ltd.
    Inventors: Masataka Kuroki, Sadamitsu Kono, Kazuyuki Shioka
  • Amidoxime derivatives
    Patent number: 4152336
    Abstract: Novel amidoxime derivatives having the following structural formula (IV) of (IV'): ##STR1## wherein R.sub.1 represents methyl or ethyl group and R.sub.2 represents hydrogen or methyl group, useful as a raw material for 3-amino-5-methyl isoxazole, are prepared from .beta.-amino crotonitrile. Said isoxazole, useful as an intermediate for various medicines, may be prepared without producing any by-products of isomer.
    Type: Grant
    Filed: March 10, 1978
    Date of Patent: May 1, 1979
    Assignee: Sogo Pharmaceutical Company Limited
    Inventors: Masataka Kuroki, Sadamitsu Kono, Kazuyuki Shioka
  • Method of producing pantethine
    Patent number: 4060551
    Abstract: Salt of pantothenic acid and salt of cystamine or cysteamine are caused to react under the presence of an accelerator selected from the group consisting of carbodiimides and N-hydroxy compounds without any pretreatment thereby producing pantethine or pantetheine, and the pantetheine is oxidized to produce pantethine which is a precursor of co-enzyme A.
    Type: Grant
    Filed: August 10, 1976
    Date of Patent: November 29, 1977
    Assignee: Sogo Pharmaceutical Company Limited
    Inventors: Saburo Uchikuga, Masataka Kuroki