US4606988A
Expired / Lapsed
US
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Styryl derivatives and electrophotographic photoconductor comprising one styryl derivative
Assignee: Ricoh Co Ltd
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Filing: 1985-02-15
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Granted: 1986-08-19
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Expires: 2005-02-15
Abstract
Abstract Styryl derivatives of the formula ##STR1## an electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer comprising at least one styryl derivative of the same formula are disclosed, in which R 1 is selected from the group consisting of an alkyl group, a substituted alkyl group, an aryl group and substituted aryl group; R 2 is selected from the group consisting of hydrogen, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and Ar represents an aryl group or a substituted aryl group.
Inventors
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06147
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
83 words
An electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer comprising at least one styryl derivative of the formula ##STR109## wherein R 1 is selected from the group consisting of an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; R 2 is selected from the group consisting of hydrogen, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and Ar represents an aryl group or a substituted aryl group.
Claim 2
Dependent Claim
83 words
An electrophotographic photoconductor comprising an electroconductive support material and a photosensitive layer comprising at least one styryl derivative of the formula ##STR109## wherein R 1 is selected from the group consisting of an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; R 2 is selected from the group consisting of hydrogen, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and Ar represents an aryl group or a substituted aryl group.
Claim 3
Dependent Claim
83 words
An electrophotographic photoconductor as claimed in claim 1, wherein said aryl group is selected from the group consisting of a phenyl group, a styryl group, a biphenylyl group, a naphthyl group and an anthryl group; and said substituted aryl group have at least one substituent selected from the group consisting of an alkyl group, an alkoxy group, an aryloxy group, halogen, a dialkylamino group, a hydroxy group, a carboxy group and esters thereof, a nitro group, an acetyl group and a cyano group.
Claim 4
Dependent Claim
40 words
An electrophotographic photoconductor as claimed in claim 1, wherein said photosensitive layer further comprises a binder agent which constitutes a charge transporting medium in combination with said styryl derivative, and a charge generating material dispersed within said charge transporting medium.
Claim 5
Dependent Claim
36 words
An electrophotographic photoconductor as claimed in claim 1, wherein said photosensitive layer comprises a charge generating layer containing a charge generating material, and a charge transporting layer containing said styryl derivative as a charge transporting material.
Claim 6
Dependent Claim
25 words
An electrophotographic photoconductor as claimed in claim 1, wherein the thickness of said photosensitive layer is in the range of 3 μm to 50 μm.
Claim 7
Dependent Claim
31 words
An electrophotographic photoconductor as claimed in claim 1, wherein the amount of said styryl derivative comprises 30 wt. % to 70 wt. % of the entire weight of said photosensitive layer.
Claim 8
Dependent Claim
25 words
An electrophotographic photoconductor as claimed in claim 3, wherein the thickness of said photosensitive layer is in the range of 3 μm to 50 μm.
Claim 9
Dependent Claim
63 words
An electrophotographic photoconductor as claimed in claim 3, wherein the amount of said styryl derivative is in the range of 10 wt. % to 95 wt. % of the entire weight of said photosensitive layer, and the amount of said charge generating material is in the range of 0.1 wt. % to 50. wt. % of the entire weight of said photosensitive layer.
Claim 10
Dependent Claim
40 words
An electrophotographic photoconductor as claimed in claim 4, wherein the thickness of said charge generating layer is not more than 5 μm and the thickness of said charge transporting layer is in the range of 3 μm to 50 μm.
Claim 11
Dependent Claim
66 words
An electrophotographic photoconductor as claimed in claim 4, wherein the amount of said charge generating material is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge generating layer, and the amount of said charge transporting material is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge transporting layer.
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) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |