Patents by Inventor Ichiro Yokoe

Ichiro Yokoe 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).

  • 1,2-benzisothiazol-3-one compound production method
    Patent number: 8802862
    Abstract: The present invention provides a method for producing 1,2-benzisothiazol-3-one compounds by reacting a 2-(alkylthio)benzonitrile compound with a halogenating agent in the presence of water, the method being characterized in that the reaction proceeds while the halogenating agent and water are gradually and simultaneously added to a reaction system containing the 2-(alkylthio)benzonitrile compound. The invention allows the simple and economical production of highly pure 1,2-benzisothiazol-3-one compounds, which are useful as antimicrobial agents, antifungal agents, etc.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: August 12, 2014
    Assignee: Sumitomo Seika Chemicals Co., Ltd.
    Inventors: Takehiro Hiyama, Ichiro Yokoe, Takeshi Takeuchi, Michio Suzuki
  • 1,2-BENZISOTHIAZOL-3-ONE COMPOUND PRODUCTION METHOD
    Publication number: 20130345433
    Abstract: The present invention provides a method for producing 1,2-benzisothiazol-3-one compounds by reacting a 2-(alkylthio)benzonitrile compound with a halogenating agent in the presence of water, the method being characterized in that the reaction proceeds while the halogenating agent and water are gradually and simultaneously added to a reaction system containing the 2-(alkylthio)benzonitrile compound. The invention allows the simple and economical production of highly pure 1,2-benzisothiazol-3-one compounds, which are useful as antimicrobial agents, antifungal agents, etc.
    Type: Application
    Filed: February 22, 2012
    Publication date: December 26, 2013
    Applicant: SUMITOMO SEIKA CHEMICALS CO., LTD.
    Inventors: Takehiro Hiyama, Ichiro Yokoe, Takeshi Takeuchi, Michio Suzuki