US4396696A
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Electrophotographic plate having azo compound photosensitive layer
Assignee: Mitsubishi Chemical America Inc
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Filing: 1982-03-31
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Granted: 1983-08-02
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Expires: 2002-03-31
Abstract
Abstract An electrophotographic plate comprising an electroconductive substrate and a photosensitive layer coated thereon, wherein said photosensitive layer comprises an azo compound represented by the general formula (I) <IMAGE> (I) wherein A is a divalent group of an aromatic hydrocarbon or a divalent group of a heterocyclic ring containing at least one nitrogen atom in the ring, Ar is an aromatic hydrocarbon group or a heterocyclic group which may be bonded through a connecting group, and n is an integer of 1, 2 or 3.
Inventors
- 👤 Hideki Nagasaka
- 👤 Tetsuo Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:34
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B35/00; C09B35/02; C09B35/021; C09B35/03; C09B35/378; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0677; G03G5/0679; G03G5/0681; G03G5/0687; G03G5/0688
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
An electrophotographic plate comprising an electroconductive substrate and a photosensitive layer coated thereon, wherein said photosensitive layer comprises an azo compound represented by the general formula (I) ##STR62## wherein A is a divalent group of an aromatic hydrocarbon or a divalent group of a heterocyclic ring containing at least one nitrogen atom in the ring, Ar is an aromatic hydrocarbon group or a heterocyclic group which may be bonded through a connecting group, and n is an integer of 1, 2 or 3.
Claim 2
Dependent Claim
83 words
An electrophotographic plate comprising an electroconductive substrate and a photosensitive layer coated thereon, wherein said photosensitive layer comprises an azo compound represented by the general formula (I) ##STR62## wherein A is a divalent group of an aromatic hydrocarbon or a divalent group of a heterocyclic ring containing at least one nitrogen atom in the ring, Ar is an aromatic hydrocarbon group or a heterocyclic group which may be bonded through a connecting group, and n is an integer of 1, 2 or 3.
Claim 3
Dependent Claim
28 words
The electrophotographic plate according to claim 1 wherein A is an o-phenylene, o-naphthylene, perinaphthylene, 2,3-pyridinediyl or 4,5-pyrimidinediyl group, each of which may optionally have one or more substituents.
Claim 4
Dependent Claim
25 words
The electrophotographic plate according to claim 1 wherein A is an o-phenylene or o-naphthylene group, each of which may optionally have one or more substituents.
Claim 5
Dependent Claim
25 words
The electrophotographic plate according to claim 2 or 3 wherein the substituent is selected from the group consisting of methyl, methoxy, nitro, chloro and hydroxy.
Claim 6
Dependent Claim
61 words
The electrophotographic plate according to claim 1 wherein Ar is a phenyl group, a naphthyl group, a 1-pyrenyl group, a naphthylene group, an anthraquinonylene group, a biphenylene group, a bisphenylene group represented by the general formula: ##STR63## where Y is --O--, --S--, --CH 2 --, --CH═CH--, ##STR64## or a naphthoylenebenzimidazolyl group, each of which may optionally have one or more substituents.
Claim 7
Dependent Claim
23 words
The electrophotographic plate according to claim 5 wherein the substituent is selected from the group consisting of nitro, cyano, methyl, ethoxy and chloro.
Claim 8
Dependent Claim
11 words
The electrophotographic plate according to claim 1 wherein Ar is ##STR65##
Claim 9
Dependent Claim
75 words
The electrophotographic plate according to any one of claims 1 to 7 wherein the photosensitive layer comprises a charge-generating layer containing the azo compound of claim 1 and a charge-transporting layer coated thereon and containing a pyrazoline compound represented by the general formula (VI) ##STR66## where Ar 1 , Ar 2 and Ar 3 are independently substituted or unsubstituted aromatic hydrocarbon groups or aromatic heterocyclic groups, and n is an integer of 0 or 1.
Claim 10
Dependent Claim
81 words
The electrophotographic plate according to any one of claims 1 to 7 wherein the photosensitive layer comprises a charge-generating layer containing the azo compound of claim 1 and a charge transporting layer coated thereon and containing a hydrazone compound represented by the general formula (VII) ##STR67## where Ar 4 is a substituted or unsubstituted aromatic hydrocarbon group or aromatic heterocyclic group, R 1 and R 2 are independently alkyl, aryl or aralkyl, and l is an integer of 1 or 2.
Claim 11
Dependent Claim
24 words
The electrophotographic plate according to claim 1 wherein the azo compound is pulverized into fine particles having a particle size of at most 5μ.
References Cited (Backward Citations)
US3898084A
Cited
US4251613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |