Patents by Inventor Tatuya Kato

Tatuya Kato 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).

  • Layered electrophotographic photoconductor
    Patent number: 4284698
    Abstract: A layered electrophotographic photoconductor comprising an electroconductive support material and a photoconductive double layer consisting of a charge generation layer comprising a disazo pigment and a charge transport layer comprising a charge transport material which is capable of forming a charge transport complex by reaction with 2,4,7-trinitro-9-fluorenone, the charge transport complex being characterized by the light energy value corresponding to the wavelength of its maximum visible spectral absorption being in the range of 1.6 to 2.1 eV.
    Type: Grant
    Filed: May 6, 1980
    Date of Patent: August 18, 1981
    Assignee: Ricoh Company, Ltd.
    Inventors: Takeo Kazami, Takamichi Enomoto, Tatuya Kato, Toshio Fukagai