05578405 is referenced by 61 patents and cites 19 patents.

An electrophotographic photoconductor includes an electroconductive support and a single-layered photoconductive layer formed thereon, containing a charge transporting material, a binder resin, and a simultaneously pulverized mixture including at least one disazo pigment of formula (1) and at least one trisazo pigment of formula (2), which is obtained by simultaneously pulverizing those azo pigments: ##STR1## wherein R.sup.1 and R.sup.2 each is hydrogen, a halogen atom, trifluoromethyl group, nitro group or cyano group; R.sup.3 is hydrogen, chlorine, fluorine, iodine, bromine, nitro group or cyano group; and Ar.sup.1, Ar.sup.2 and Ar.sup.3 each is a coupler radical, which may be the same or different.

Title
Electrophotographic photoconductor containing disazo and trisazo pigments
Application Number
8/323347
Publication Number
5578405
Application Date
October 14, 1994
Publication Date
November 26, 1996
Inventor
Masayuki Koyano
Sagamihara
JP
Megumi Kawahara
Yokohama
JP
Kaoru Tadokoro
Yamato
JP
Yasuo Suzuki
Fuji
JP
Masaomi Sasaki
Susono
JP
Katsuichi Ohta
Mishima
JP
Takashi Rokutanzono
Numazu
JP
Eiji Kurimoto
Numazu
JP
Takaaki Ikegami
Numazu
JP
Agent
Oblon Spivak Mcclelland Maier & Neustadt P C
Assignee
Ricoh Company
JP
IPC
G03G 5/06
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