Patents by Inventor Kazayuki Urabe

Kazayuki Urabe 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).

  • Electrophotographic photoreceptor with doped Se or Se alloy interlayer
    Patent number: 4990420
    Abstract: In an electrophotographic photoreceptor, a layer is interposed between the electroconductive substrate and the surface photosensitive layer or between the carrier transport layer and the carrier generation layer of the photosensitive layer, said layer being made of an Se-As alloy, Se-Te alloy, or pure Se incorporated with any of Ga, In, Zn, Au, Ag, C, Pt, Ge, Pb, and Sb to reduce the band gap. This layer increases the efficiency of hole injection from the substrate, resulting in the rapid decay of negative charging.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: February 5, 1991
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Kazayuki Urabe