Patents by Inventor Yoshikazu Kogame

Yoshikazu Kogame 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).

  • Purification method of N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine
    Patent number: 7071349
    Abstract: The present invention is to provide a purification method of obtaining N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine of high quality in good yield with high productivity, which is accordingly suited for commercial scale application. An impurity-contaminated N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine is crystallized from a mixed solvent of alcohol and water in a volume ratio of alcohol/water being 1 to 20 to remove a contaminating impurity into a mother liquor and give crystals of N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine.
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: July 4, 2006
    Assignee: Kanaka Corporation
    Inventors: Akira Matsumoto, Michio Nomura, Yoshikazu Kogame, Yasuyoshi Ueda
  • Purification method of n-(1(s)-ethoxycarbonyl-3-phenylpropyl)-l-alanine
    Publication number: 20030162991
    Abstract: The present invention is to provide a purification method of obtaining N-(1(S)-ethoxycarbonyl-3-phenylpropyl)-L-alanine of high quality in good yield with high productivity, which is accordingly suited for commercial scale application.
    Type: Application
    Filed: April 8, 2003
    Publication date: August 28, 2003
    Inventors: Akira Matsumoto, Michio Nomura, Yoshikazu Kogame, Yasuyoshi Ueda
  • Process for preparing 3 halogeno-2-hydroxypropyltrimethylammonium halide
    Patent number: 4814506
    Abstract: A process for preparing 3-halogeno-2-hydroxy-propyltrimethylammonium halide or especially one having the (S)-configuration, which comprises reacting 2,3-dihydroxypropyltrimethylammonium halide or one having the (S)-configuration, which is obtained by reacting (R)-3-halogeno-1,2-propanediol with trimethylamine, with a halogenating reagent.According to the present invention, 3-halogeno-2-hydroxypropyltrimethylammonium halide or one having the (S)-configuration, which is a useful intermediate for the synthesis of carnitine or especially (l)-carnitine, can be obtained economically, efficiently and easily.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: March 21, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Kazuhiko Katayama, Shigeki Hamaguchi, Yoshikazu Kogame, Takehisa Ohashi, Kiyoshi Watanabe