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US4833054A
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Electrophotographic photoreceptor having a bisazo compound
Assignee: Fujifilm Business Innovation Corp
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Filing: 1987-10-30
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Granted: 1989-05-23
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Expires: 2007-10-30
Abstract
Abstract An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photosensitive layer composed of a charge generating layer and a charge transport layer, wherein said charge generating layer contains a bisazo compound represented by formula (I) ##STR1## wherein X, Y, and A are defined in the specification, and said charge transport layer contains a benzidine compound represented by formula (II) ##STR2## wherein R 1 , R 2 , and R 3 are as defined in the specification. The photoreceptor exhibits high photoresponse performance even in a weak electric field and exhibits high sensitivity in a visible light region.
Inventors
- 👤 Yutaka Akasaki
- 👤 Katsuhiro Sato
- 👤 Tokita
- 👤 Hidemi Suto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:06
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443; G03G5/0664; G03G5/0675; G03G5/0679
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
129 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photosensitive layer composed of a charge generating layer and a charge transport layer, wherein said charge generating layer contains a bisazo compound represented by formula (I) ##STR100## wherein X represents a hydrogen atom, a halogen atom or a nitro group, Y represents ##STR101## or ═O, and A represents a divalent aromatic hydrocarbon group or a divalent heterocyclic group containing at least one nitrogen atom; and said charge transport layer contains a benzidine compound represented by formula (II) ##STR102## wherein R 1 represents an alkyl group or an alkoxy group, and R 2 and R 3 each represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.
Claim 2
Dependent Claim
129 words
An electrophotographic photoreceptor comprising an electrically conductive support having provided thereon a photosensitive layer composed of a charge generating layer and a charge transport layer, wherein said charge generating layer contains a bisazo compound represented by formula (I) ##STR100## wherein X represents a hydrogen atom, a halogen atom or a nitro group, Y represents ##STR101## or ═O, and A represents a divalent aromatic hydrocarbon group or a divalent heterocyclic group containing at least one nitrogen atom; and said charge transport layer contains a benzidine compound represented by formula (II) ##STR102## wherein R 1 represents an alkyl group or an alkoxy group, and R 2 and R 3 each represents a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, an alkoxycarbonyl group or a substituted amino group.
Claim 3
Dependent Claim
18 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said charge generating layer further contains a binder resin.
Claim 4
Dependent Claim
30 words
An electrophotographic photoreceptor as claimed in claim 2, wherein said bisazo compound is present in an amount of from 10 to 90% by weight based on the charge generating layer.
Claim 5
Dependent Claim
22 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said charge generating layer has a thickness of from 0.05 to 3 μm.
Claim 6
Dependent Claim
18 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said charge transport layer further contains a binder resin.
Claim 7
Dependent Claim
30 words
An electrophotographic photoreceptor as claimed in claim 5, wherein said benzidine compound is present in an amount of from 10 to 90% by weight based on the charge transport layer.
Claim 8
Dependent Claim
22 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said charge transport layer has a thickness of from 5 to 50 μm.
Claim 9
Dependent Claim
16 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said Y in formula (I) is ##STR103##
Claim 10
Dependent Claim
16 words
An electrophotographic photoreceptor as claimed in claim 1, wherein said Y in formula (I) is ═O.
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) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |