Patents by Inventor Ryouichi Kitajima

Ryouichi Kitajima 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).

  • Flexible electrophotographic photoconductor having a polysulfone curl prevention layer
    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