Patent US4480019A successfully refreshed from Google Patents.
US4480019A
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Electrophotographic photosensitive material
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1983-04-12
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Granted: 1984-10-30
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Expires: 2003-04-12
Abstract
Abstract Disclosed is a photosensitive material for electrophotography, which comprises a photosensitive layer containing a disazo pigment represented by the following formula: ##STR1## wherein R 1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R 2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and Y stands for a group represented by the following formula: ##STR2## in which B stands for a benzene, naphthalene, indole, carbazole or benzofuran ring or a substitution product thereof, which is fused to the benzene ring, Ar 1 and Ar 2 stand for a benzene ring, a naphthalene ring, a dibenzofuran ring or a substitution product thereof, R 3 stands for a lower alkyl group, a carboxyl group or a carboxyl ester group, and R 4 stands for a hydrogen atom, a lower alkyl group, a phenyl group or a substituted phenyl group.
Inventors
- 👤 Teruaki Higashiguchi
- 👤 Kaname Nakatani
- 👤 Nobuhiro Miyakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:52
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/037; C09B31/00; C09B31/02; C09B31/06; C09B31/12; C09B31/14; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
141 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR23## wherein R 1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R 2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and Y stands for a group represented by the following formula: ##STR24## in which B stands for a benzene, naphthalene, indole, carbazole or banzofuran ring or a substitution product thereof, which is fused to the benzene ring, and Ar 1 stands for a benzene ring, a naphthalene ring, a dibenzofuran ring or a substitution product thereof.
Claim 2
Dependent Claim
141 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR23## wherein R 1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R 2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and Y stands for a group represented by the following formula: ##STR24## in which B stands for a benzene, naphthalene, indole, carbazole or banzofuran ring or a substitution product thereof, which is fused to the benzene ring, and Ar 1 stands for a benzene ring, a naphthalene ring, a dibenzofuran ring or a substitution product thereof.
Claim 3
Dependent Claim
28 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer is composed of a dispersion of the disazo pigment in an electrically insulating binder medium.
Claim 4
Dependent Claim
33 words
A photosensitive material as set forth in claim 2, wherein the disazo pigment is present in an amount of 5 to 100 parts by weight per 100 parts by weight of the binder.
Claim 5
Dependent Claim
30 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer is composed of a dispersion of the disazo pigment as a charge-generating pigment in a charge-transporting substance.
Claim 6
Dependent Claim
35 words
A photosensitive material as set forth in claim 4, wherein the disazo pigment is present in an amount of 1 to 30 parts by weight per 100 parts by weight of the entire photosensitive layer.
Claim 7
Dependent Claim
40 words
A photosensitive material as set forth in claim 1, wherein the photosensitive layer comprises a charge-generating layer containing the disazo pigment, which is formed on an electroconductive substrate, and a layer of a charge-transporting substance formed on the charge-generating layer.
Claim 8
Dependent Claim
33 words
A photosensitive material as set forth in claim 6, wherein the charge-generating layer has a thickness of 0.1 to 3 microns and the charge-transporting layer has a thickness of 5 to 30 microns.
Claim 9
Dependent Claim
21 words
A photosensitive material as set forth in claim 1 wherein the disazo pigment is selected from the group consisting of ##STR25##
Claim 10
Dependent Claim
105 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR26## wherein R 1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R 2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and R 4 stands for a hydrogen atom, a lower alkyl group, a phenyl group or a substituted phenyl group.
Claim 11
Dependent Claim
105 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR26## wherein R 1 stands for a lower alkyl group or a lower alkoxy group, n is a number of zero, 1 or 2, R 2 stands for a lower alkyl group, a lower alkoxy group, a di-lower-alkylamino group, a nitro group or a halogen atom, m is a number of zero, 1 or 2, Z stands for a benzene ring or a naphthalene ring, and R 4 stands for a hydrogen atom, a lower alkyl group, a phenyl group or a substituted phenyl group.
Claim 12
Dependent Claim
28 words
A photosensitive material as set forth in claim 9, wherein the photosensitive layer is composed of a dispersion of the disazo pigment in an electrically insulating binder medium.
Claim 13
Dependent Claim
33 words
A photosensitive material as set forth in claim 10, wherein the disazo pigment is present in an amount of 5 to 100 parts by weight per 100 parts by weight of the binder.
Claim 14
Dependent Claim
30 words
A photosensitive material as set forth in claim 9, wherein the photosensitive layer is composed of a dispersion of the disazo pigment as a charge-generating pigment in a charge-transporting substance.
Claim 15
Dependent Claim
35 words
A photosensitive material as set forth in claim 12, wherein the disazo pigment is present in an amount of 1 to 30 parts by weight per 100 parts by weight of the entire photosensitive layer.
Claim 16
Dependent Claim
40 words
A photosensitive material as set forth in claim 9, wherein the photosensitive layer comprises a charge-generating layer containing the disazo pigment, which is formed on an electroconductive substrate, and a layer of a charge-transporting substance formed on the charge-generating layer.
Claim 17
Dependent Claim
33 words
A photosensitive material as set forth in claim 14, wherein the charge-generating layer has a thickness of 0.1 to 3 microns and the charge-transporting layer has a thickness of 5 to 30 microns.
Claim 18
Dependent Claim
21 words
A photosensitive material as set forth in claim 9, wherein the disazo pigment is selected from the group consisting of ##STR27##
Claim 19
Dependent Claim
21 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR28##
Claim 20
Dependent Claim
21 words
A photosensitive material for electrophotography, which comprises a photosensitive layer containing a photoconductive disazo pigment represented by the following formula: ##STR28##
Claim 21
Dependent Claim
28 words
A photosensitive material as set forth in claim 17, wherein the photosensitive layer is composed of a dispersion of the disazo pigment in an electrically insulating binder medium.
Claim 22
Dependent Claim
33 words
A photosensitive material as set forth in claim 18, wherein the disazo pigment is present in an amount of 5 to 100 parts by weight per 100 parts by weight of the binder.
Claim 23
Dependent Claim
30 words
A photosensitive material as set forth in claim 17, wherein the photosensitive layer is composed of a dispersion of the disazo pigment as a charge-generating pigment in a charge-transporting substance.
Claim 24
Dependent Claim
35 words
A photosensitive material as set forth in claim 20, wherein the disazo pigment is present in an amount of 1 to 30 parts by weight per 100 parts by weight of the entire photosensitive layer.
Claim 25
Dependent Claim
40 words
A photosensitive material as set forth in claim 17, wherein the photosensitive layer comprises a charge-generating layer containing the disazo pigment, which is formed on an electroconductive substrate, and a layer of a charge-transporting substance formed on the charge-generating layer.
Claim 26
Dependent Claim
33 words
A photosensitive material as set forth in claim 22, wherein the charge-generating layer has a thickness of 0.1 to 3 microns and the charge-transporting layer has a thickness of 5 to 30 microns.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |