Patents by Inventor Koichi Shizuru

Koichi Shizuru 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).

  • Conductive roll and method for producing same
    Patent number: 8163389
    Abstract: A conductive roll having at least one conductive elastic layer on the outer periphery of a core bar, the conductive elastic layer being granted conductivity by carbon black, is provided. The conductive elastic layer is prepared by reacting at least a polyol consisting essentially of a polyether-based polyol with a diisocyanate with the use of a tetravalent organotin-based compound having a tin content of 18.7% or less by weight as a catalyst. A method for producing the conductive roll is also provided.
    Type: Grant
    Filed: April 6, 2005
    Date of Patent: April 24, 2012
    Assignee: Synztec Co., Ltd
    Inventors: Naoki Hirakawa, Koichi Shizuru, Makoto Iwamura
  • Conductive roll and method for producing same
    Publication number: 20050227089
    Abstract: A conductive roll having at least one conductive elastic layer on the outer periphery of a core bar, the conductive elastic layer being granted conductivity by carbon black, is provided. The conductive elastic layer is prepared by reacting at least a polyol consisting essentially of a polyether-based polyol with a diisocyanate with the use of a tetravalent organotin-based compound having a tin content of 18.7% or less by weight as a catalyst. A method for producing the conductive roll is also provided.
    Type: Application
    Filed: April 6, 2005
    Publication date: October 13, 2005
    Inventors: Naoki Hirakawa, Koichi Shizuru, Makoto Iwamura