Inventor
KOZIMA AKIO
JP15 patents
Patents
15 patentsUS4256821AMar 17, 1981
Electrophotographic element with carbazole-phenyhydrazone charge transport layer
RICOH KK113 citations94
US4264695AApr 28, 1981
Electrophotographic photosensitive material with electron donors and electron acceptors
RICOH KK37 citations92
US4279981AJul 21, 1981
Electrophotographic elements containing trisazo compounds
RICOH KK28 citations82
US4272598AJun 9, 1981
Electrophotographic material containing disazo compounds
RICOH KK23 citations82
US4426327AJan 17, 1984
3,6-Disazo-9-ethyl carbazole compounds
RICOH KK11 citations74
US4314015AFeb 2, 1982
Electrophotographic sensitive materials containing disazo compounds
RICOH KK18 citations74
US4299896ANov 10, 1981
Electrophotographic sensitive materials containing a disazo pigment
RICOH KK19 citations74
US4293628AOct 6, 1981
Electrophotographic elements containing disazo compounds
RICOH KK11 citations74
US4242260ADec 30, 1980
2-Hydroxy-3-carbonylanilinonaphth-1-yl disazo derivatives and 1-phenyl-3-methyl-5-hydroxypyrazol-4-yl disazo derivatives of 1,4-bis(4-aminostyryl) benzene
RICOH KK10 citations74
US4135928AJan 23, 1979
Electrophotographic light-sensitive member
RICOH KK9 citations74
US4301224ANov 17, 1981
Electrophotographic element with a combination of binder resins
RICOH KK15 citations73
US4134761AJan 16, 1979
3-(9-Fluorenylidene)carbazole derivatives and electrophotographic light-sensitive material containing same
RICOH KK7 citations73
US4148638AApr 10, 1979
Photoconductive sensitive material with a trinitro-11-indeno[1,2-b]quinoxaline-11-one
RICOH KK3 citations63
US4348470ASep 7, 1982
Electrophotographic element containing disazo compounds
RICOH KK3 citations60
US4108656AAug 22, 1978
Photoconductive member having a charge generating pigment and 2,4,7-trinitrothioxanthone as charge transport material
RICOH KK0 citations52