US4247614A
Expired / Lapsed
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Electrophotographic element containing a disazo pigment
Assignee: Ricoh Co Ltd
•
Filing: 1979-11-16
•
Granted: 1981-01-27
•
Expires: 1999-11-16
Abstract
Abstract The present invention provides an electrophotographic element which comprises some disazo pigment expressed by the general formula ##STR1## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR2## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR3## and n is an interger of 1 or 2.] as effective component contained in the photosensitive layer thereof.
Inventors
- 👤 Masafumi Ohta
- 👤 Kiyoshi Sakai
- 👤 Mitsuru Hashimoto
- 👤 Masaomi Sasaki
- 👤 Tomiko Kawakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:19
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; C; C09; C09B; C09B33/00; C09B33/02; C09B33/147
Claims Analysis
Total Claims: 117
Claim 1
Independent Claim
92 words
A photosensitive element for use in electrophotography which comprises an electroconductive support and a photosensitive layer, formed thereon, consisting essentially of a disazo pigment expressed by the general formula ##STR13## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR14## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR15## and n is an integer of 1 or 2] and a resin binder.
Claim 2
Dependent Claim
92 words
A photosensitive element for use in electrophotography which comprises an electroconductive support and a photosensitive layer, formed thereon, consisting essentially of a disazo pigment expressed by the general formula ##STR13## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR14## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR15## and n is an integer of 1 or 2] and a resin binder.
Claim 3
Dependent Claim
25 words
A photosensitive element according to claim 1 wherein the thickness of said photosensitive layer is in the range of from about 3μ to about 50μ.
Claim 4
Dependent Claim
32 words
A photosensitive element according to claim 1 wherein the amount of said disazo pigment is in the range of from 30 wt. % to 70 wt. % relative to the photosensitive layer.
Claim 5
Dependent Claim
11 words
A photosensitive element according to claim 1 wherein A represents ##STR16##
Claim 6
Dependent Claim
11 words
A photosensitive element according to claim 1 wherein A represents ##STR17##
Claim 7
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR18##
Claim 8
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR19##
Claim 9
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR20##
Claim 10
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR21##
Claim 11
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR22##
Claim 12
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR23##
Claim 13
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR24##
Claim 14
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR25##
Claim 15
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR26##
Claim 16
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR27##
Claim 17
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR28##
Claim 18
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR29##
Claim 19
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR30##
Claim 20
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR31##
Claim 21
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR32##
Claim 22
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR33##
Claim 23
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR34##
Claim 24
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR35##
Claim 25
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR36##
Claim 26
Dependent Claim
17 words
A photosensitive element according to claim 1 wherein the compound expressed by the general formula is ##STR37##
Claim 27
Dependent Claim
96 words
A photosensitive element for use in electrophotography which comprises an electroconductive support and a photosensitive layer, formed thereon, consisting essentially of a disazo pigment expressed by the general formula ##STR38## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR39## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR40## and n is an integer of 1 or 2], a charge transfer substance and a resin binder.
Claim 28
Dependent Claim
96 words
A photosensitive element for use in electrophotography which comprises an electroconductive support and a photosensitive layer, formed thereon, consisting essentially of a disazo pigment expressed by the general formula ##STR38## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR39## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR40## and n is an integer of 1 or 2], a charge transfer substance and a resin binder.
Claim 29
Dependent Claim
25 words
A photosensitive element according to claim 26 wherein the thickness of said photosensitive layer is in the range of from about 3μ to about 50μ.
Claim 30
Dependent Claim
54 words
A photosensitive element according to claim 26 wherein the amount of said disazo pigment is in the range of from 1 wt.% to 50 wt.% relative to the photosensitive layer and the amount of said charge transfer substance is in the range of from 10 wt.% to 95 wt.% relative to the photosensitive layer.
Claim 31
Dependent Claim
11 words
A photosensitive element according to claim 26 wherein A represents ##STR41##
Claim 32
Dependent Claim
11 words
A photosensitive element according to claim 26 wherein A represents ##STR42##
Claim 33
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR43##
Claim 34
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR44##
Claim 35
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR45##
Claim 36
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR46##
Claim 37
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR47##
Claim 38
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR48##
Claim 39
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR49##
Claim 40
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR50##
Claim 41
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR51##
Claim 42
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR52##
Claim 43
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR53##
Claim 44
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR54##
Claim 45
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR55##
Claim 46
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR56##
Claim 47
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR57##
Claim 48
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR58##
Claim 49
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR59##
Claim 50
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR60##
Claim 51
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR61##
Claim 52
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR62##
Claim 53
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR63##
Claim 54
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR64##
Claim 55
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR65##
Claim 56
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR66##
Claim 57
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR67##
Claim 58
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR68##
Claim 59
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR69##
Claim 60
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR70##
Claim 61
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR71##
Claim 62
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR72##
Claim 63
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR73##
Claim 64
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR74##
Claim 65
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR75##
Claim 66
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR76##
Claim 67
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR77##
Claim 68
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR78##
Claim 69
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR79##
Claim 70
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR80##
Claim 71
Dependent Claim
17 words
A photosensitive element according to claim 26 wherein the compound expressed by the general formula is ##STR81##
Claim 72
Dependent Claim
17 words
A photosensitive material according to claim 26 wherein the compound expressed by the general formula is ##STR82##
Claim 73
Dependent Claim
105 words
A photosensitive element for use in electrophotography which comprises an electroconductive support on which there is a charge-carrier generating layer consisting essentially of a disazo pigment expressed by the general formula ##STR83## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR84## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR85## and n is an integer of 1 or 2] and a charge transfer layer consisting essentially of a charge-transfer substance and a resin binder.
Claim 74
Dependent Claim
105 words
A photosensitive element for use in electrophotography which comprises an electroconductive support on which there is a charge-carrier generating layer consisting essentially of a disazo pigment expressed by the general formula ##STR83## [wherein R 1 represents a member selected from the group consisting of hydrogen atom, methyl radical, ethyl radical, methoxy radical, ethoxy radical, chlorine atom, bromine atom, nitro radical, dimethylamino radical, diethylamino radical and phenyl radical; A represents ##STR84## (wherein R 2 represents hydrogen atom or chlorine atom) or ##STR85## and n is an integer of 1 or 2] and a charge transfer layer consisting essentially of a charge-transfer substance and a resin binder.
Claim 75
Dependent Claim
44 words
A photosensitive element according to claim 71 wherein the thickness of said charge-carrier generating layer is in the range of from about 0.01μ to about 5μ, and the thickness of said charge-transfer layer is in the range of from about 3μ to about 50μ.
Claim 76
Dependent Claim
30 words
A photosensitive element according to claim 71 wherein the amount of said charge-transfer substance is in the range of from 10 wt.% to 95 wt.% relative to the charge-transfer layer.
Claim 77
Dependent Claim
11 words
A photosensitive element according to claim 71 wherein A represents ##STR86##
Claim 78
Dependent Claim
11 words
A photosensitive element according to claim 71 wherein A represents ##STR87##
Claim 79
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR88##
Claim 80
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR89##
Claim 81
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR90##
Claim 82
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR91##
Claim 83
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR92##
Claim 84
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR93##
Claim 85
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR94##
Claim 86
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR95##
Claim 87
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR96##
Claim 88
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR97##
Claim 89
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR98##
Claim 90
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR99##
Claim 91
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR100##
Claim 92
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR101##
Claim 93
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR102##
Claim 94
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR103##
Claim 95
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR104##
Claim 96
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR105##
Claim 97
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR106##
Claim 98
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR107##
Claim 99
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR108##
Claim 100
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR109##
Claim 101
Dependent Claim
10 words
A photosensitive element according to claim 71 wherein the compound
Claim 102
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR110##
Claim 103
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR111##
Claim 104
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR112##
Claim 105
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR113##
Claim 106
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR114##
Claim 107
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR115##
Claim 108
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR116##
Claim 109
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR117##
Claim 110
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR118##
Claim 111
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR119##
Claim 112
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR120##
Claim 113
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR121##
Claim 114
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR122##
Claim 115
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR123##
Claim 116
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR124##
Claim 117
Dependent Claim
17 words
A photosensitive element according to claim 71 wherein the compound expressed by the general formula is ##STR125##
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |