Patents by Inventor Tatsuya Akasaka

Tatsuya Akasaka 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).

  • Triazole derivative, herbicidal compositions containing the derivatives and methods of their use
    Patent number: 5759958
    Abstract: An object of the present invention is to provide a 1,2,4-triazole derivative which in a small amount exhibits high herbicidal activity against weeds in paddy fields, lawns or farmlands, the derivative being without injury to rice, turf grasses and crops. The 1,2,4-triazole derivative is represented by the formula ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and independently represent hydrogen or methyl, R.sup.3 and R.sup.4 are the same or different and independently represent halogen, lower alkyl, lower alkoxy, lower haloalkyl, lower haloalkoxy or cyano, R.sup.5 represents methyl or ethyl and X represents oxygen or sulfur.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: June 2, 1998
    Assignee: Otsuka Kagaku Kabushiki Kaisha
    Inventors: Yoshinori Endo, Hirofumi Nakagawa, Hiroshi Fujishima, Isao Tada, Minoru Motoki, Daisuke Yanase, Mitsuyuki Murakami, Tatsuya Akasaka