Patents by Inventor Takashi Mitsuyama

Takashi Mitsuyama 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 biguanide derivative
    Patent number: 5286905
    Abstract: The present invention relates to a process for the production of a biguanide derivative useful as an intermediate for triazine-type herbicides, in which the biguanide derivative can be produced at high yields by reacting a phenoxyalkylamine salt with dicyandiamide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms, or by reacting a free phenoxylakylamine with a hydrogen halide in a solvent containing a paraffinic hydrocarbon having 8 to 15 carbon atoms and reacting the resultant a phenoxyalkylamine salt with dicyandiamide in the same solvent without isolating the phenoxyalkylamine salt.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: February 15, 1994
    Assignee: Idemitsu Kosan Company Limited
    Inventors: Kazufumi Nakamura, Masahiro Nishii, Ryoichi Adachi, Masatoshi Uemura, Ichiro Nasuno, Izumi Terada, Takashi Mitsuyama, Hidetoshi Koga