Patents by Inventor Satoshi Otomura

Satoshi Otomura 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).

  • Patent number: 4942104
    Abstract: An electrophotographic photoconductor is disclosed, which comprises a flexible film-type substrate, an electroconductive layer formed on a front surface of the substrate, a photoconductive layer formed on the electroconductive layer, and a curl prevention layer formed on the back side of the substrate opposite to the back side thereof, in which the curl prevention layer comprises one resin component selected from the group consisting of a polysulfone resin and a polyarylate resin.
    Type: Grant
    Filed: September 16, 1988
    Date of Patent: July 17, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Ryouichi Kitajima, Satoshi Otomura
  • Patent number: 4764442
    Abstract: An electrode for use with an electrophotographic photoconductor comprising a non-aluminum metal layer and an aluminum layer which are successively formed on a substrate, thereby constituting a double-layered electrode, and an electrophotographic photoconductor including the double layered electrode are disclosed.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: August 16, 1988
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Otomura, Hideki Akiyoshi
  • Patent number: 4740441
    Abstract: An electrophotographic photoconductor is disclosed which comprises a substantially transparent substrate, an electroconductive layer formed thereon, comprising an alloy selected from the group consisting of a Ni-based heat resistant alloy, a Fe-based heat resistant alloy and a Co-based heat resistant alloy, and a photoconductive layer formed on the electroconductive layer.
    Type: Grant
    Filed: September 24, 1986
    Date of Patent: April 26, 1988
    Assignee: Ricoh Company, Ltd.
    Inventor: Satoshi Otomura
  • Patent number: 4702979
    Abstract: This invention relates to a method of forming an image, characterized by applying voltage on a photosensitive material having a photoconductive layer and an electroconductive layer on a substrate in such a manner as to make said electroconductive layer positive and said photoconductive layer negative while irradiating optical information on said positive electroconductive layer or said negative photoconductive layer, thereby causing an anodic ion reaction on the interface between said electroconductive layer and said photoconductive layer to selectively change the spectral absorption properties of at least one of said electroconductive layer and said photoconductive layer depending on the irradiated optical information; said photosensitive material comprising an electroconductive layer of metal as a simple substance, its alloy or its metal compound applied on a substrate and a photoconductive layer overlaid on said electroconductive layer.
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: October 27, 1987
    Assignee: Ricoh Co., Ltd.
    Inventors: Satoshi Otomura, Narihito Kojima
  • Patent number: 4379820
    Abstract: A layered electrophotographic photoconductor comprising an electrically conductive base; a charge transporting layer, formed on the electrically conductive base, which charge transporting layer comprises a selenium-tellurium alloy, doped with halogen; and a charge generating layer, formed on the charge transporting layer, which charge generating layer comprises a selenium-tellurium-arsenic alloy, doped with halogen.
    Type: Grant
    Filed: April 17, 1981
    Date of Patent: April 12, 1983
    Assignee: Ricoh Company, Ltd.
    Inventors: Hitoshi Nakamura, Hideyo Nishizima, Hideaki Ema, Makoto Harigaya, Satoshi Otomura
  • Patent number: 4191568
    Abstract: A photosensitive material for use in electrophotography is disclosed which comprises a conductive support, a photoconductive layer superposed on said support and a protective layer superposed on said photoconductive layer, said surface protective layer containing an organic compound which has a structure according to the formula ##STR1## in a part of the molecule.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: March 4, 1980
    Assignee: Ricoh Co., Ltd.
    Inventors: Hideaki Ema, Satoshi Otomura, Chikara Imai, Kiyoshi Sakai