Patents by Inventor Emi Tohyama

Emi Tohyama 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).

  • Strains of Drechslera spp., weed control compositions containing the same and methods for controlling weeds using the same
    Patent number: 5424271
    Abstract: Described are new strains of Drechslera spp., which possess herbicidal effects against all varieties of barnyard grass, i.e., Echinochloa spp. as weed but do not give any influence to crops under cultivation such as rice. Weed control agents according to the present invention, which contain one or more of the novel strains, have high safety and selectivity, thereby providing practical control effects against barnyard grass. Weed control compositions according to the present invention, which contain one or more of the new strains in combination with one or more chemical herbicides, have sufficient herbicidal effects even at dosages which are too low to permit control of weeds when they are applied singly, thereby making it possible to reduce the dosage of herbicides. The weed control compositions can therefore contribute to the prevention of environmental pollution and the occurrence of weeds with acquired pesticide resistance.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: June 13, 1995
    Assignee: Mitsui Toatsu Chemicals, Inc.
    Inventors: Kenichi Yamaguchi, Masanobu Arita, Masatoshi Gohbara, Tatsuo Shinmi, Keiko Fukui, Emi Tohyama
  • Strains of Drechslera ssp for controlling grass
    Patent number: 5332573
    Abstract: Described are new strains of Drechslera spp., which possess herbicidal effects against all varieties of barnyard grass, i.e., Echinochloa spp. but do not give any influence to crops under cultivation such as rice. The control agents according to the present invention, which contain one or more of the strains, have high safety and selectivity, thereby providing practical control effects against barnyard grass. Further, the control compositions according to the present invention, which contain one or more of the new strains in combination with one or more chemical herbicides, have sufficient herbicidal effects even at dosages which are too low to permit control of barnyard grass when they are applied singly, thereby making it possible to reduce the dosage of herbicides. Thus, the control compositions can therefore contribute to the prevention of environmental pollution and the occurrence of barnyard grass with acquired pesticide resistance.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: July 26, 1994
    Assignee: Mitsui Toatsu Chemicals Inc.
    Inventors: Kenichi Yamaguchi, Masanobu Arita, Masatoshi Gohbara, Tatsuo Shinmi, Keiko Fukui, Emi Tohyama