Patents by Inventor Yosio Kawaguchi

Yosio Kawaguchi 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).

  • Diphenyl ether derivatives and herbicidal compositions containing the same
    Patent number: 4213775
    Abstract: New diphenyl ether derivatives having one to three substituents selected from a halogen atom and a trifluoromethyl group at any optional one to three positions of the 2'-, 3'-, 4'-, 5'- and 6'-positions in one phenyl moiety and nitro group at the 4-position and unsubstituted or substituted aminosulfonyl group at the 3-position in another phenyl moiety. They have a superior herbicidal effect and can be prepared starting from a known 3-benzylmercapto compound through three steps.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: July 22, 1980
    Assignee: Ube Industries, Ltd.
    Inventors: Shigeki Nagai, Hakobu Sekioka, Mitsuaki Takenaka, Masazumi Sakata, Yosio Kawaguchi, Seiji Takamura, Minoru Nishimura