Fitzpatrick, Cella, Harper & Scinto
Electrophotographic photosensitive member with disazo or trisazo compound
 An electrophotographic photosensitive member comprises a layer containing at least one azo pigment represented by the following formula (I): ##STR1## in the formula, Cp represents a coupler residue; A.sub.1 and A.sub.2 each represent a divalent organic residue; n represents 0 or 1; and when n is 0, A.sub.3 represents substituted or unsubstituted alkyl, substituted or unsubstituted aryl, or --(CH.dbd.CH).sub.l --R', wherein R' is a substituted or unsubstituted heterocyclic ring residue an l is 0, 1 or 2, and when n is 1, A.sub.3 represents a divalent organic residue. 
Canon Kabushiki Kaisha
G G G C C
G03G G03G G03G C09B C09B
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Shozo Norie Naoto Masakazu Yoshio Takeshi Takashi
Ishikawa Takebayashi Fujimura Matsumoto Takasu Fujita Tanaka