US4734347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic plate having a protective layer of a fluorine-containing copolymer
Assignee: Resonac Corp
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Filing: 1986-10-08
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Granted: 1988-03-29
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Expires: 2006-10-08
Abstract
Abstract An electrophotographic plate having a protective layer comprising a fluorine-containing copolymer having monomer units of a fluoroolefin, and an alkyl vinyl ether and/or cycloalkyl vinyl ether on an organic photoconductive layer formed on the electroconductive layer is excellent in electrophotographic properties and durability.
Inventors
- 👤 Keiichi Endo
- 👤 Akira Kageyama
- 👤 Yasuo Katsuya
- 👤 Yasuki Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:26
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/147; G03G5/14708; G03G5/14713; G03G5/14717; G03G5/1473; G03G5/14726
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
An electrophotographic plate comprising an electroconductive layer, an organic photoconductive layer formed on the electroconductive layer, and a protective layer formed on the organic photoconductive layer, said protective layer comprising a fluorine-containing copolymer having as monomer units a fluoroolefin and at least one of an alkyl vinyl ether and a cycloalkyl vinyl ether.
Claim 2
Dependent Claim
53 words
An electrophotographic plate comprising an electroconductive layer, an organic photoconductive layer formed on the electroconductive layer, and a protective layer formed on the organic photoconductive layer, said protective layer comprising a fluorine-containing copolymer having as monomer units a fluoroolefin and at least one of an alkyl vinyl ether and a cycloalkyl vinyl ether.
Claim 3
Dependent Claim
25 words
An electrophotographic plate according to claim 1, wherein the organic photoconductive layer is a multi-layer comprising a charge generating layer and a charge transport layer.
Claim 4
Dependent Claim
42 words
An electrophotographic plate according to claim 1, wherein the fluorine-containing copolymer comprises 40 to 60% by mole of the total monomer units of fluoroolefin and 5 to 60% by mole of the monomer units of alkyl vinyl ether and cycloalkyl vinyl ether.
Claim 5
Dependent Claim
21 words
An electrophotographic plate according to claim 1, wherein the fluorine-containing copolymer has a weight average molecular weight of 5000 to 150,000.
Claim 6
Dependent Claim
48 words
An electrophotographic plate according to claim 1, wherein the fluoroolefin is chlorotrifluoroethylene, trifluoroethylene, tetrafluoroethylene, or a mixture thereof; the alkyl vinyl ether is ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether, hexyl vinyl ether, or a mixture thereof; and the cycloalkyl vinyl ether is cyclohexyl vinyl ether.
Claim 7
Dependent Claim
42 words
An electrophotographic plate according to claim 2, wherein the fluorine-containing copolymer comprises 40 to 60% by mole of the total monomer units of fluoroolefin and 5 to 60% by mole of the monomer units of alkyl vinyl ether and cycloalkyl vinyl ether.
Claim 8
Dependent Claim
21 words
An electrophotographic plate according to claim 2, wherein the fluorine-containing copolymer has a weight average molecular weight of 5000 to 150,000.
Claim 9
Dependent Claim
48 words
An electrophotographic plate according to claim 2, wherein the fluoroolefin is chlorotrifluoroethylene, trifluoroethylene, tetrafluoroethylene, or a mixture thereof; the alkyl vinyl ether is ethyl vinyl ether, propyl vinyl ether, butyl vinyl ether, hexyl vinyl ether, or a mixture thereof; and the cycloalkyl vinyl ether is cyclohexyl vinyl ether.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |