Patents by Inventor Kohji Minamida

Kohji Minamida 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 4-benzoylpyrazoles
    Patent number: 4415739
    Abstract: 4-Benzoyl-5-hydroxypyrazoles useful as herbicidal active ingredients, their intermediate or stabilizers against heat, oxidation or ultraviolet light are produced by a condensation of a pyrazolone, tetrachloromethane and a benzene compound in the presence of an aluminium halide, followed by a hydrolysis reaction with industrial advantages.
    Type: Grant
    Filed: July 20, 1982
    Date of Patent: November 15, 1983
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Takahiro Haga, Tetsuji Nishikawa, Toshio Nakajima, Kohji Minamida, Masaru Maeda
  • Process for producing 4-benzoylpyrazoles
    Patent number: 4383116
    Abstract: 4-Benzoyl-5-hydroxypyrazoles useful as herbicidal active ingredients or their intermediate are produced by a condensation of a pyrazolone and a benzotrichloride followed by a hydrolysis reaction with industrial advantages.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: May 10, 1983
    Assignee: Ishihara Sangyo Kaisha Ltd.
    Inventors: Takahiro Haga, Tetsuji Nishikawa, Toshio Nakajima, Kohji Minamida, Masaru Maeda