US4356243A
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Electrophotographic media with benzoxazole group containing dis-azo compound
Assignee: Canon Inc
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Filing: 1981-02-19
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Granted: 1982-10-26
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Expires: 2001-02-19
Abstract
Abstract An electrophotographic light-sensitive medium is described comprising at least an electrically conductive layer, a charge generation layer and a charge transport layer, the charge generation layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A is a coupler having aromatic properties, and B is a group selected from hydrogen, halogen, lower alkyl having 1 to 4 carbon atoms and lower alkoxy having 1 to 4 carbon atoms.
Inventors
- 👤 Shozo Ishikawa
- 👤 Kazuharu Katagiri
- 👤 Katsunori Watanabe
- 👤 Shigeto Ohta
- 👤 Makoto Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:22
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/34; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
63 words
An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by the Formula (1) ##STR37## wherein A is an aromatic coupler containing therein a phenolic hydroxy group, and B is selected from the group consisting of hydrogen, a halogen, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.
Claim 2
Dependent Claim
63 words
An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by the Formula (1) ##STR37## wherein A is an aromatic coupler containing therein a phenolic hydroxy group, and B is selected from the group consisting of hydrogen, a halogen, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.
Claim 3
Dependent Claim
120 words
An electrophotographic light-sensitive medium as in claim 1, wherein A is represented by Formula (2) ##STR38## wherein X is a group capable of being condensed with the benzene ring of Formula (2) to form a naphthalene ring, an anthracene ring, a carbazole ring or a dibenzofuran ring, and Y is --CONR 1 R 2 or --COOR 2 , wherein R 1 is selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, and a substituted or unsubstituted phenyl group, and R 2 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted pyridyl group, and a diphenylamino group.
Claim 4
Dependent Claim
42 words
An electrophotographic light-sensitive medium as in claim 1, wherein A is represented by Formula (3) or Formula (4) ##STR39## wherein R 3 is selected from the group consisting of a substituted or unsubstituted alkyl group and a substituted or unsubstituted phenyl group.
Claim 5
Dependent Claim
25 words
An electrophotographic light-sensitive medium as in claim 3, wherein when A is represented by Formula (3), R 3 is a substituted or unsubstituted alkyl group.
Claim 6
Dependent Claim
16 words
An electrophotographic light-sensitive medium as in claim 1, wherein A is represented by Formula (5) ##STR40##
Claim 7
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by the formula ##STR41##
Claim 8
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by the formula ##STR42##
Claim 9
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by the formula ##STR43##
Claim 10
Dependent Claim
39 words
An electrophotographic light-sensitive medium as in claim 1, 2, 3, 4, 5, 6, 7, or 8, wherein the light-sensitive medium comprises an electrically conductive layer, a light-sensitive charge generation layer containing the dis-azo compound, and a charge transport layer.
Claim 11
Dependent Claim
30 words
An electrophotographic light-sensitive medium as in claim 9, wherein the layers are laminated in the order of the electrically conductive layer, the charge generation layer, and the charge transport layer.
Claim 12
Dependent Claim
21 words
An electrophotographic light-sensitive medium as in claim 9, wherein the thickness of the charge generation layer is about 5μ or less.
Claim 13
Dependent Claim
22 words
An electrophotographic light-sensitive medium as in claim 9, wherein the thickness of the charge generation layer is from about 0.01μ to 1μ.
Claim 14
Dependent Claim
181 words
A dis-azo compound represented by Formula (1) ##STR44## wherein A is represented by Formula (2), Formula (3), Formula (4), or Formula (5): ##STR45## wherein X is a group capable of being condensed with the benzene ring of Formula (2) to form a naphthalene ring, an anthracene ring, a carbazole ring and a dibenzofuran ring, Y is --CONR 1 R 2 or --COOR 2 , wherein R 1 is selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, and a substituted or unsubstituted phenyl group, and R 2 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted pyridyl group and a diphenylamino group, R 3 is selected from a group consisting of a substituted or unsubstituted alkyl group and a substituted or unsubstituted phenyl group, and B is selected from the group consisting of hydrogen, a halogen, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.
Claim 15
Dependent Claim
181 words
A dis-azo compound represented by Formula (1) ##STR44## wherein A is represented by Formula (2), Formula (3), Formula (4), or Formula (5): ##STR45## wherein X is a group capable of being condensed with the benzene ring of Formula (2) to form a naphthalene ring, an anthracene ring, a carbazole ring and a dibenzofuran ring, Y is --CONR 1 R 2 or --COOR 2 , wherein R 1 is selected from the group consisting of hydrogen, a substituted or unsubstituted alkyl group, and a substituted or unsubstituted phenyl group, and R 2 is selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted pyridyl group and a diphenylamino group, R 3 is selected from a group consisting of a substituted or unsubstituted alkyl group and a substituted or unsubstituted phenyl group, and B is selected from the group consisting of hydrogen, a halogen, a lower alkyl group having 1 to 4 carbon atoms, and a lower alkoxy group having 1 to 4 carbon atoms.
Claim 16
Dependent Claim
17 words
A dis-azo compound as in claim 13, wherein said dis-azo compound is represented by the formula ##STR46##
Claim 17
Dependent Claim
17 words
A dis-azo compound as in claim 13, wherein said dis-azo compound is represented by the formula ##STR47##
Claim 18
Dependent Claim
17 words
A dis-azo compound as in claim 13, wherein said dis-azo compound is represented by the formula ##STR48##
References Cited (Backward Citations)
US4024125A
Cited
GB1564083A
Cited
US4251614A
Cited
US4260672A
Cited
US4299896A
Cited
US4278747A
Cited
US4247614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-25 | 1986-04-26 | 1986-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-25 | 1990-04-26 | 1990-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-25 | 1994-04-26 | 1994-10-26 | $7700.00 | Window Closed / Lapsed |