Patents by Inventor Katsuji Takao

Katsuji Takao 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).

  • Method for making electrostatic recording sheet and resulting product
    Patent number: 3956571
    Abstract: An electrostatic recording sheet is produced by coating the opposite surfaces of a paper sheet with an electroconductive coating composition including a cationic polymer electroconductive agent and a cationic sizing agent to form electroconductive layers and further coating one of said electroconductive layers with a dielectric coating composition in the form of an aqueous polymer dispersion to form a recording layer via a penetration resist layer. The penetration resist layer is formed of a gelated material produced by an ionic reaction on contact of said aqueous polymer dispersion with said electroconductive layer.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: May 11, 1976
    Assignee: Kanzaki Paper Manufacturing Co., Ltd.
    Inventors: Katsuji Takao, Koji Otsubo