Patents by Inventor Naoko Akashi

Naoko Akashi 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).

  • Photosensitive element for electrophotography produced by sublimation
    Patent number: 4431722
    Abstract: Disclosed is a photosensitive element for electrophotography comprised of a layered structure having a polycyclic quinone pigment dispersed in an organic resin binder as a charge generating layer and an organic charge transport layer mixed with a resin binder.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: February 14, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshiaki Takei, Yoshihide Fujimaki, Naoko Akashi, Hiroyuki Nomori
  • Layered electrophotographic photosensitive element having hydrazone charge transport material
    Patent number: 4424266
    Abstract: An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising (i) a carrier-generating phase layer containing a carrier-generating material selected from the group consisting of perylene dyes, polycyclic quinones and azo dyes and (ii) a carrier-transporting phase layer containing a carrier-transporting material wherein said carrier-transporting phase comprises a hydrazone compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
    Type: Grant
    Filed: September 23, 1981
    Date of Patent: January 3, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Seiji Kurihara, Satoshi Goto, Tsuneo Wada, Akira Kinoshita, Yoshiaki Takei, Naoko Akashi, Hiroyuki Nomori
  • Layered electrophotographic photosensitive element having hydrazone charge transport layer
    Patent number: 4410615
    Abstract: An electrophotographic photosensitive element having a conductive support provided thereon with a photosensitive layer comprising a carrier-generating phase and a carrier-transporting phase. The carrier-transporting phase comprises a hydrazone compound to improve carrier-transporting ability having the formula ##STR1## wherein, X and Y each represent a hydrogen or a halogen, R.sub.1 and R.sub.2 each represent an aryl group which may have a substituent or substituents, and Ar represents an arylene group which may have a substituent or substituents.
    Type: Grant
    Filed: September 30, 1981
    Date of Patent: October 18, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Satoshi Goto, Akira Kinoshita, Tsuneo Wada, Yoshiaki Takei, Naoko Akashi, Hiroyuki Nomori