Patents by Inventor Yasushi Shinbo

Yasushi Shinbo 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).

  • Enamine derivatives
    Patent number: 5233089
    Abstract: A novel enamine derivative is effective as a charge transport material and can provide an electrophotographic plate excellent in sensitivity, photoresponse and durability.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: August 3, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Yasuo Katsuya, Takayuki Akimoto, Yoshii Morishita, Yasushi Shinbo, Akira Kageyama, Shigeru Hayashida
  • Electrophotographic plate including an undercoating layer having a smooth surface
    Patent number: 4954406
    Abstract: In an electrophotographic plate, that having an undercoating layer with smooth surface when observed by using a scanning electron microscope and an electric conductivity of at least 2.times.10.sup.-14 .OMEGA..sup.-1 .multidot.cm.sup.-1 between an electroconductive substrate and a photosensitive layer is improved in electrophotographic properties which are hardly changed by changes of circumstances.
    Type: Grant
    Filed: November 1, 1988
    Date of Patent: September 4, 1990
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Keiichi Endo, Yasushi Shinbo, Akira Kageyama, Yasuo Katsuya, Chihiro Kato, Masato Fukasawa, Makoto Sekine