Patents by Inventor Yuji Egarashi

Yuji Egarashi 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 member with hydrazone or ketazine compounds
    Patent number: 4420548
    Abstract: An electrophotographic photosensitive member is characterized by having a layer containing at least one of hydrazone group compounds represented by the following formula (1) or of ketazine group compounds represented by the following formula (2): ##STR1## In the formula, R.sub.11 and R.sub.12 independently of one another represent hydrogen, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic radical; R.sub.13 and R.sub.14 independently of one another represent subsituted or unsubstituted alkyl, substituted or unsubstituted aralkyl, substituted or unsubstituted aryl, or substituted or unsubstituted heterocyclic radical; and R.sub.15 represents a divalent organic residue. ##STR2## In the formula, R.sub.21, R.sub.22, R.sub.23, and R.sub.24 independently one another represent substituted or unsubstituted alkyl, substituted or substituted aralkyl, or substituted or unsubstituted aryl, or R.sub.21 and R.sub.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: December 13, 1983
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kiyoshi Sakai, Minoru Mabuchi, Toshiko Suzuki, Yuji Egarashi, Shozo Ishikawa