US4415641A
Expired / Lapsed
US
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Electrophotographic light-sensitive element
Assignee: Konica Minolta Inc
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Filing: 1982-03-02
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Granted: 1983-11-15
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Expires: 2002-03-02
Abstract
Abstract An electrophotographic light-sensitive element comprising a conductive support which supports a light-sensitive layer containing a carbazole derivative of the formula: ##STR1## wherein R 1 is an aryl group, R 2 is hydrogen, a halogen, an alkyl, an alkoxy, an amino or hydroxy group, and R 3 is an aryl, or a heterocyclic group.
Inventors
- 👤 Satoshi Goto
- 👤 Akira Kinoshita
- 👤 Yoshiaki Takei
- 👤 Yoshihide Fujimaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:21
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
An electrophotographic light-sensitive element comprising a conductive support which supports a light-sensitive layer containing a carbazole derivative of the formula: ##STR13## wherein R 1 is an aryl group, R 2 is hydrogen, a halogen, an alkyl, an alkoxy, an amino or hydroxy group, and R 3 is an aryl, or a heterocyclic group.
Claim 2
Dependent Claim
53 words
An electrophotographic light-sensitive element comprising a conductive support which supports a light-sensitive layer containing a carbazole derivative of the formula: ##STR13## wherein R 1 is an aryl group, R 2 is hydrogen, a halogen, an alkyl, an alkoxy, an amino or hydroxy group, and R 3 is an aryl, or a heterocyclic group.
Claim 3
Dependent Claim
22 words
The electrophotographic light-sensitive element of claim 1, wherein said aryl group in R 1 is a phenyl group or a naphthyl group.
Claim 4
Dependent Claim
51 words
The electrophotographic light-sensitive element of claim 1, wherein said aryl group in R 1 is unsubstituted phenyl, unsubstituted naphthyl, phenyl or naphthyl substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dimethylamino group, a diethylamino group, chlorine or bromine.
Claim 5
Dependent Claim
49 words
The electrophotographic light-sensitive element of claim 1, wherein R 2 is selected from the group consisting of hydrogen, chlorine atom, bromine atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dimethylamino group, a diethylamino group and hydroxy group.
Claim 6
Dependent Claim
84 words
The electrophotographic light-sensitive element of claim 1, wherein R 3 is selected from the group consisting of a phenyl group, a naphthyl group, an anthryl group, a furyl group, a thienyl group, a carbazyl group, a benzfuryl group and a benzthienyl group, which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a phenyl group, a dimethylamino group, a diethylamino group, a diphenylamino group, a hydroxy group or a halogen atom.
Claim 7
Dependent Claim
126 words
The electrophotographic light-sensitive element of claim 3, wherein R 2 is selected from the group consisting of hydrogen, chloride atom, bromine atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a dimethylamino group, a diethylamino group and hydroxy group; wherein R 3 is selected from the group consisting of a phenyl group, a naphthyl group, an anthryl group, a furyl group, a thienyl group, a carbazyl group, a benzfuryl group and a benzthienyl group, which may be substituted by an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a phenyl group, a dimethylamino group, a diethylamino group, a diphenylamino group, a hydroxy group or a halogen atom.
Claim 8
Dependent Claim
16 words
The electrophotographic light-sensitive element of claim 1, wherein said light-sensitive layer further comprises a carrier-generation material.
Claim 9
Dependent Claim
16 words
The electrophotographic light-sensitive element of claim 6, wherein said light-sensitive layer further comprises a carrier-generation material.
Claim 10
Dependent Claim
25 words
The electrophotographic light-sensitive element of claim 7, wherein said light-sensitive layer comprises a layer containing said carrier-generation material and a layer containing said carbazole derivative.
Claim 11
Dependent Claim
25 words
The electrophotographic light-sensitive element of claim 8, wherein said light-sensitive layer comprises a layer containing said carrier-generation material and a layer containing said carbazole derivative.
Claim 12
Dependent Claim
19 words
The electrophotographic light-sensitive element of claim 1, further comprising an interlayer between said light-sensitive layer and said conductive support.
Claim 13
Dependent Claim
44 words
The electrophotographic light-sensitive element of claim 1, wherein said light-sensitive layer further comprises a spectral sensitizing dye selected from the group consisting of triphenyl methane dye, xanthene dye, thiazine dye, oxazine dye, cyanine dye, styryl dye, pyrylium salt dye and 3, 3'-dicarbazolyl methane dye.
Claim 14
Dependent Claim
15 words
The electrophotographic light-sensitive element of claim 1, wherein said light-sensitive layer further comprises a binder.
Claim 15
Dependent Claim
38 words
The electrophotographic light-sensitive element of claim 9, wherein said layer containing said carrier-generation material has a thickness of 0.05 to 3 microns and said layer containing said carbazole derivative has a thickness of from 5 to 30 microns.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |