Patent US4055420A successfully refreshed from Google Patents.
US4055420A
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Single phase organic photoconductive composition
Assignee: Xerox Corp
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Filing: 1977-01-27
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Granted: 1977-10-25
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Expires: 1997-01-27
Abstract
Abstract There is described a single phase organic photoconductive composition consisting of a solid solution of N-ethyl-3-tricyanovinylcarbazole and 2,5-bis(N,N-dimethylaminophenyl) oxadiazole in a polycarbonate binder material. The composition exhibits a shallow field dependence for the photogeneration of charge carriers and thus provides a high contrast potential photoconductive system.
Inventors
- 👤 William W. Limburg
- 👤 Damodar M. Pai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0633; G03G5/14; G03G5/147
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
46 words
An organic photoconductive composition consisting essentially of about 3.2 weight percent N-ethyl-3-tricyanovinylcarbazole, about 32.3 weight percent 2,5-bis(N,N-dimethylaminophenyl) oxadiazole and about 64.5% of a polycarbonate resin having recurring structural units represented by the formula ##STR4##where n is in the range of from about 150 to about 400.
Claim 2
Dependent Claim
46 words
An organic photoconductive composition consisting essentially of about 3.2 weight percent N-ethyl-3-tricyanovinylcarbazole, about 32.3 weight percent 2,5-bis(N,N-dimethylaminophenyl) oxadiazole and about 64.5% of a polycarbonate resin having recurring structural units represented by the formula ##STR4##where n is in the range of from about 150 to about 400.
Claim 3
Dependent Claim
11 words
The composition defined in claim 1 wherein n is about 200.
Claim 4
Dependent Claim
19 words
A photoconductive imaging member comprising a conductive substrate and a photoconductive insulating layer of the composition of claim 2.
Claim 5
Dependent Claim
23 words
A photoconductive imaging member comprising a conductive substrate, a photoconductive insulating layer of the composition of claim 2 and an electrically insulating overcoating.
Claim 6
Dependent Claim
13 words
The member as defined in claim 4 wherein said overcoating is electronically inert.
Claim 7
Dependent Claim
21 words
The member as defined in claim 4 wherein said overcoating is capable of transporting at least one species of charge carrier.
References Cited (Backward Citations)
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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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |