US4359513A
Expired / Lapsed
US
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Electrophotographic light-sensitive disazo compounds having diphenylacrylonitrile group
Assignee: Canon Inc
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Filing: 1981-02-19
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Granted: 1982-11-16
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Expires: 2001-02-19
Abstract
Abstract An electrophotographic light-sensitive medium is described comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR1## wherein A represents a coupler having aromatic properties.
Inventors
- 👤 Kazuharu Katagiri
- 👤 Katsunori Watanabe
- 👤 Shigeto Ohta
- 👤 Shozo Ishikawa
- 👤 Makoto Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:14
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0683
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
25 words
An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR30## wherein A represents a coupler having aromatic properties.
Claim 2
Dependent Claim
25 words
An electrophotographic light-sensitive medium comprising a light-sensitive layer containing a dis-azo compound represented by Formula (1) ##STR30## wherein A represents a coupler having aromatic properties.
Claim 3
Dependent Claim
114 words
An electrophotographic light-sensitive medium as in claim 1, wherein A of Formula (1) is represented by Formula (2) ##STR31## wherein ##STR32## is selected from the group consisting of a naphthalene ring, an anthracene ring, a carbazole ring and 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 of Formula (1) is represented by Formula (3) ##STR33## 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
19 words
An electrophotographic light-sensitive medium as in claim 1, wherein A of Formula (1) is represented by Formula (4) ##STR34##
Claim 6
Dependent Claim
20 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound of formula (1) has the structural formula ##STR35##
Claim 7
Dependent Claim
40 words
An electrophotographic light-sensitive medium as in claim 1, 2, 3, 4 or 5, wherein the light-sensitive medium comprises an electrically conductive layer, a light-sensitive charge generation layer containing the dis-azo compound represented by Formula (1), and a charge transport layer.
Claim 8
Dependent Claim
30 words
An electrophotographic light-sensitive medium as in claim 6, wherein the layers are laminated in the order of the electrically conductive layer, the charge generation layer, and the charge transport layer.
Claim 9
Dependent Claim
21 words
An electrophotographic light-sensitive medium as in claim 6, wherein the thickness of the charge generation layer is about 5μ or less.
Claim 10
Dependent Claim
22 words
An electrophotographic light-sensitive medium as in claim 6, wherein the thickness of the charge generation layer is from about 0.01μ to 1μ.
Claim 11
Dependent Claim
16 words
A dis-azo compound represented by Formula (1) ##STR36## wherein A represents a copolymer having aromatic properties.
Claim 12
Dependent Claim
16 words
A dis-azo compound represented by Formula (1) ##STR36## wherein A represents a copolymer having aromatic properties.
Claim 13
Dependent Claim
141 words
A dis-azo compound as in claim 10, wherein A of Formula (1) is represented by the Formula (2), Formula (3) or Formula (4): ##STR37## wherein ##STR38## is selected from the group consisting of 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, and R 3 is selected from the group consisting of a substituted or unsubstituted alkyl group and a substituted or unsubstituted phenyl group.
Claim 14
Dependent Claim
17 words
A dis-azo compound as in claim 11, wherein said dis-azo compound is represented by the Formula ##STR39##
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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |