Patents by Inventor Katsuaki Ohba

Katsuaki Ohba 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).

  • Aminopyrimidine derivatives and their production and use
    Patent number: 5519139
    Abstract: There is disclosed a novel 4-aminopyrimidine derivative containing an optionally esterified carboxyl group at the 5-position which has potent fungicidal activity as well as insecticidal and miticidal activity. The compound is useful as agricultural fungicides, insecticides and miticides.
    Type: Grant
    Filed: May 23, 1995
    Date of Patent: May 21, 1996
    Assignee: Shionogi & Co., Ltd.
    Inventors: Toshikazu Ohtsuka, Moriyasu Masui, Takami Takeda, Michio Masuko, Katsuaki Ohba
  • Aminopyrimidine derivatives and their production and use
    Patent number: 5439911
    Abstract: There is disclosed a novel 4-aminopyrimidine derivative containing an optionally esterified carboxyl group at the 5-position which has potent fungicidal activity as well as insecticidal and miticidal activity. The compound is useful as agricultural fungicides, insecticides and miticides. There are also disclosed a process for producing the above compound and agricultural fungicidal, insecticidal and miticidal compositions.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: August 8, 1995
    Assignee: Shionogi & Co., Ltd.
    Inventors: Toshikazu Ohtsuka, Moriyasu Masui, Takami Takeda, Michio Masuko, Katsuaki Ohba