Patents by Inventor Hirohiko Hamaguchi

Hirohiko Hamaguchi 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).

  • Composition for thermally stablizing o-pyridylphosphates or thiophosphates by incorporating various proportions of certain phthalate esters thereto
    Patent number: 4810793
    Abstract: Novel composition and method for thermally stabilizing an O-pyridyl phosphate insecticide such as chlorpyrifos. The insecticide is mixed with a phthalate ester prior to its incorporation into a thermoplastic resin, such as polyvinyl chloride.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: March 7, 1989
    Assignee: The Dow Chemical Company
    Inventors: Jiro Kozuma, Hirohiko Hamaguchi, Tetsuya Shibahara, Joseph P. Strasser
  • Method for incorporating chlorpyrifos into thermoplastic resins
    Patent number: 4631301
    Abstract: Novel composition and method for thermally stabilizing an O-pyridyl phosphate insecticide such as chlorpyrifos. The insecticide is mixed with a phthalate ester prior to its incorporation into a thermoplastic resin, such as polyvinyl chloride.
    Type: Grant
    Filed: February 6, 1985
    Date of Patent: December 23, 1986
    Assignee: Dow Chemical Japan Limited
    Inventors: Jiro Kozuma, Hirohiko Hamaguchi, Tetsuya Shibahara, Joseph P. Strasser