US4743523A
Expired / Lapsed
US
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Photosensitive member for electrophotography
Assignee: Canon Inc
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Filing: 1986-03-27
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Granted: 1988-05-10
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Expires: 2006-03-27
Abstract
Abstract A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): ##STR1## wherein R is an alkyl, aralkyl, aryl, or acyl each capable of having a substituent; Ar is an arylene or heterocyclic group each capable of having a substituent; Ar is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1.
Inventors
- 👤 Masataka Yamashita
- 👤 Takao Takiguchi
- 👤 Shoji Umehara
- 👤 Masakazu Matsumoto
- 👤 Shozo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:13
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0683; C; C09; C09B; C09B35/00; G03G5/0681; G03G5/0685; G03G5/0687; G03G5/0688; G03G5/069; G03G5/0692; G03G5/0694
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
139 words
A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): wherein R is alkyl, aralkyl, or acyl, each capable of having a substituent; Ar is an arylene or heterocyclic group; each capable of having a substituent; A is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1; said azo pigment being (i) in a charge generation layer of a functionally separated photosensitive layer comprising said charge generation layer and a charge transportation layer or (ii) admixed with a charge transporting binder material; wherein said charge transporting binder material is a charge transporting binder or a mixture of a charge transporting substance and a binder.
Claim 2
Dependent Claim
139 words
A photosensitive member for electrophotography comprising a photosensitive layer containing an azo pigment selected from those represented by the following formulas (1)-(6): wherein R is alkyl, aralkyl, or acyl, each capable of having a substituent; Ar is an arylene or heterocyclic group; each capable of having a substituent; A is a coupler residue group having a phenolic OH group; B is hydrogen, nitroso, or an alkyl, aralkyl, aryl or acyl group capable of having a substituent; and n is 0 or 1; said azo pigment being (i) in a charge generation layer of a functionally separated photosensitive layer comprising said charge generation layer and a charge transportation layer or (ii) admixed with a charge transporting binder material; wherein said charge transporting binder material is a charge transporting binder or a mixture of a charge transporting substance and a binder.
Claim 3
Dependent Claim
152 words
A photosensitive member according to claim 1, wherein the group A is a group selected from those represented by the following formulas (7)-(13): ##STR20## wherein X is a residue group forming a polycyclic aromatic or heterocyclic ring through condensation with a benzene ring; R 3 and R 4 are respectively hydrogen, an alkyl, aralkyl, aryl or heterocyclic group capable of having a substituent or may be such groups as to form a cyclic amino group is combination with each other and a nitrogen atom; R 5 and R 6 are respectively an alkyl, aralkyl or aryl group capable of having a substituent; Y is a divalent aromatic group or a nitrogen-containing divalent heterocyclic group; R 7 and R 8 are respectively an aryl or heterocyclic group capable of having a substituent; R 9 and R 10 are respectively hydrogen, or an alkyl, aralkyl, aryl or heterocyclic group capable of having a substituent.
Claim 4
Dependent Claim
40 words
A photosensitive member according to claim 1, wherein said photosensitive layer is functionally separated into a charge generation layer and a charge transportation layer, said charge generation layer containing an azo pigment selected from those represented by the formulas (1)-(6).
Claim 5
Dependent Claim
43 words
A photosensitive member according to claim 2, wherein said photosensitive layer is functionally separated into a charge generation layer and a charge transportation layer, said charge generation layer containing the pigment having the group A selected from those represented by the formulas (7)-(13).
Claim 6
Dependent Claim
39 words
A photosensitive member according to claim 2, wherein in the formula (7), the R 3 is hydrogen and R 4 is a substituted phenyl represented by the formula: ##STR21## wherein R 11 is halogen, nitro, cyano, or trifluoromethyl group.
Claim 7
Dependent Claim
19 words
A photosensitive member according to claim 3 or 4, wherein the charge transportation layer comprises an electron transporting substance.
Claim 8
Dependent Claim
19 words
A photosensitive member according to claim 3 or 4, wherein the charge transportation layer comprises a hole transporting substance.
Claim 9
Dependent Claim
18 words
A photosensitive member according to claim 7, wherein the hole transporting substance is selected from hydrazones and pyrazolines.
Claim 10
Dependent Claim
25 words
A photosensitive member according to claim 1, wherein in the formula (6), B is --AR--N═N--A and Ar and A are respectively the same as defined.
Claim 11
Dependent Claim
23 words
A photosensitive member according to claim 10, wherein in the formula (1), R is alkyl or aryl, each capable of having a substituent.
Claim 12
Dependent Claim
17 words
A photosensitive member according to claim 10, wherein in the formula (1), R is methyl or phenyl.
Claim 13
Dependent Claim
24 words
A photosensitive member according to claim 1, wherein in the formulas (2), (3) and (5), R is an alkyl capable of having a substituent.
Claim 14
Dependent Claim
18 words
A photosensitive member according to claim 12, wherein in the formulas (2), (3) and (5), R is methyl.
Claim 15
Dependent Claim
21 words
A photosensitive member according to claim 1, wherein in the formula (4), R is an alkyl capable of having a substituent.
Claim 16
Dependent Claim
17 words
A photosensitive member according to claim 14, wherein in the formula (4), R is methyl or ethyl.
Claim 17
Dependent Claim
25 words
A photosensitive member according to claim 1, wherein in the formula (6), R is alkyl, aryl, acyl, or --Ar--N═N--A, each capable of having a substituent.
Claim 18
Dependent Claim
36 words
A photosensitive member according to claim 16, wherein in the formula (6), R is methyl, phenyl, acetyl or ##STR22## wherein A is ##STR23## R 5 is an alkyl, aralkyl or aryl capable of having a substituent.
References Cited (Backward Citations)
US4279981A
Cited
US4582771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |