Patents by Inventor Noriko Hirayama

Noriko Hirayama 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).

  • Ozone filter used in electrophotographic apparatus including catalyst of CuO, MnO.sub.2, and a water-soluble polymer
    Patent number: 5371577
    Abstract: An electrophotographic apapratus of the type in which a photosensitive member is charged by atmospheric discharge, is equipped with an air filter including a substrate and a catalyst layer formed on the substrate including at least three components of CuO, MnO.sub.2 and a water-soluble polymer. The catalyst layer shows a reactivity with NOx and the water-soluble polymer traps the resultant HNO.sub.3 while retaining a high ozone removing efficiency, whereby the apparatus can show excellent electrophotographic performances even after successive use while preventing deterioration due to ozone, NOx and HNO.sub.3 produced by the atmospheric discharge.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: December 6, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoto Fujimura, Koji Yamazaki, Kiyoshi Sakai, Teigo Sakakibara, Noriko Hirayama
  • Electrophotographic photosensitive member with electrical conductor containing polyether-polyurethane layer
    Patent number: 5079117
    Abstract: An electrophotographic photosensitive member has a photosensitive layer provided on an electroconductive support with interposition of an intermediate layer, the intermediate layer containing a polyether-polyurethane and an electroconductive substance.An electrophotographic apparatus, comprises an electrophotographic photosensitive member having a photosensitive layer provided on an electroconductive support with interposition of an intermediate layer, the intermediate layer containing a polyether-polyurethane and an electroconductive substance.A facsimile apparatus comprises an electrophotographic apparatus and a receiving means for receiving image information from a remote terminal, the electrophotographic apparatus comprising an electrophotographic photosensitive member having a photosensitive layer provided on an electroconductive support with interposition of an intermediate layer, the intermediate layer containing a polyether-polyurethane and an electroconductive substance.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: January 7, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Koyama, Hideki Anayama, Yuichi Hashimoto, Noriko Hirayama, Kiyoshi Sakai, Teigo Sakakibara, Naoto Fujimura, Shoji Amamiya