Patents by Inventor Normitsu Tsurushige

Normitsu Tsurushige 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).

  • Foamable composition of vinyl chloride polymers and method of producing open cell sheet
    Patent number: 4226943
    Abstract: This invention provides a foamable composition of vinyl chloride polymers comprising a vinyl chloride polymer, a plasticizer, a synthetic hydrocarbon wax, an alkali metal-zinc stabilizer and a decomposable organic blowing agent; and a method of producing an open cell sheet of vinyl chloride polymers comprising shaping the foamable composition into a sheet-like body and heating the resulting shaped body.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: October 7, 1980
    Assignee: Otsuka Kagaku Yakuhin Kabushiki Kaisha
    Inventors: Normitsu Tsurushige, Toshinori Takao, Shinichi Yamada