US4419428A
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Electrophotographic light-sensitive media having a dis-azo compound
Assignee: Canon Inc
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Filing: 1981-05-18
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Granted: 1983-12-06
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Expires: 2001-05-18
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) <IMAGE> (1) wherein A represents a single bond, <IMAGE> B represents a coupler having aromatic properties; and R represents a group selected from hydrogen, a halogen and a lower alkyl having 1 to 4 carbon atoms.
Inventors
- 👤 Kazuharu Katagiri
- 👤 Shozo Ishikawa
- 👤 Katsunori Watanabe
- 👤 Shigeto Ohta
- 👤 Makoto Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0681
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
An electrophotographic light-sensitive medium having a light-sensitive layer, comprising: fine particles of a dis-azo compound represented by Formula (1) ##STR42## wherein A represents one of a single bond, ##STR43## B represents an aromatic coupler having therein a phenolic hydroxy group; and R is selected from the group consisting essentially of hydrogen, a halogen and a lower alkyl having 1 to 4 carbon atoms.
Claim 2
Dependent Claim
63 words
An electrophotographic light-sensitive medium having a light-sensitive layer, comprising: fine particles of a dis-azo compound represented by Formula (1) ##STR42## wherein A represents one of a single bond, ##STR43## B represents an aromatic coupler having therein a phenolic hydroxy group; and R is selected from the group consisting essentially of hydrogen, a halogen and a lower alkyl having 1 to 4 carbon atoms.
Claim 3
Dependent Claim
102 words
An electrophotographic light-sensitive medium as in claim 1, wherein B is represented by Formula (2) ##STR44## wherein ##STR45## is a ring selected from the group consisting essentially of a benzene ring, a naphthalene ring, an indole ring, and a dibenzofuran ring; Y is --CONR 1 R 2 , and wherein R 1 is selected from the group consisting essentially of hydrogen, a substituted or unsubstituted alkyl, and a substituted or unsubstituted phenyl, and R 2 is selected from a group consisting essentially of a substituted or unsubstituted phenyl, a substituted or unsubstituted naphthyl, a substituted or unsubstituted pyridyl, and a substituted amino.
Claim 4
Dependent Claim
42 words
An electrophotographic light-sensitive medium as in claim 1, wherein B is represented by Formula (3) or Formula (4) ##STR46## and wherein R 3 is selected from a group consisting essentially of a substituted or unsubstituted alkyl and a substituted or unsubstituted phenyl.
Claim 5
Dependent Claim
16 words
An electrophotographic light-sensitive medium as in claim 1, wherein B is represented by Formula (5) ##STR47##
Claim 6
Dependent Claim
22 words
An electrophotographic light-sensitive medium as in claim 2, wherein R is selected from the group consisting essentially of hydrogen, chlorine and methyl.
Claim 7
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by Formula (6) ##STR48##
Claim 8
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by Formula (7) ##STR49##
Claim 9
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by Formula (8) ##STR50##
Claim 10
Dependent Claim
18 words
An electrophotographic light-sensitive medium as in claim 1, wherein the dis-azo compound is represented by Formula (9) ##STR51##
Claim 11
Dependent Claim
45 words
An electrophotographic light-sensitive medium as in claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the light-sensitive medium further 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 12
Dependent Claim
28 words
An electrophotographic light-sensitive medium as in claim 10, wherein the electrically conductive layer overlies the charge generation layer, and the charge generation layer overlies the charge transport layer.
Claim 13
Dependent Claim
21 words
An electrophotographic light-sensitive medium as in claim 10, wherein the thickness of the charge generation layer is about 5μ or less.
Claim 14
Dependent Claim
25 words
An electrophotographic light-sensitive medium as in claim 10, wherein the thickness of the charge generation layer is in the range of about 0.01μ to 1μ.
Claim 15
Dependent Claim
22 words
An electrophotographic light-sensitive medium as in claim 1, wherein R is selected from the group consisting essentially of hydrogen, chlorine and methyl.
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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |