US4539282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoconductive elements
Assignee: Tomoegawa Paper Manufacturing Co Ltd
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Filing: 1983-12-20
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Granted: 1985-09-03
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Expires: 2003-12-20
Abstract
Abstract Electrophotographic photosensitive element using zinc oxide in a photosensitive layer thereof formed in conductive support are described. Zinc oxide is used in combination with polycarbonate binder and a compound of the specific type. The compound is represented by the formula ##STR1## in which R 1 , R 2 , R 3 and R 4 independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group, R 5 and R 6 independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, or an aryl group, R 7 , R 8 , R 9 and R 10 independently represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, an alkoxy group or an amino group. Optionally, R 5 and R 6 may jointly form a saturated or unsaturated hydrocarbon ring having from 3 to 10 carbon atoms.
Inventors
- 👤 Junichi Morimoto
- 👤 Fumio Kawamura
- 👤 Akira Watanabe
- 👤 Yoshio Suzuki
- 👤 Masamichi Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:54
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/051; G03G5/0517; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
212 words
An electrophotographic photosensitive element which comprises a conductive support and at least a photosensitive layer formed on said conductive support, said photosensitive layer comprising sensitizing dye treated zinc oxide, a polycarbonate binder used in an amount ranging from 5 to 400 parts by weight per hundred parts by weight of said zinc oxide, and a compound of the general formula (I) used in an amount ranging from 5 to 500 parts by weight per hundred parts by weight of said zinc oxide, ##STR5## in which R 1 , R 2 , R 3 and R 4 independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group, R 5 and R 6 independently represent a hydrogen atom, a substituted or unsubstitued alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, or an aryl group, R 7 , R 8 , R 9 and R 10 independently represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, an alkoxy group or an amino group, and optionally R 5 and R 6 are able to jointly form a saturated or unsaturated hydrocarbon ring having from 3 to 10 carbon atoms.
Claim 2
Dependent Claim
212 words
An electrophotographic photosensitive element which comprises a conductive support and at least a photosensitive layer formed on said conductive support, said photosensitive layer comprising sensitizing dye treated zinc oxide, a polycarbonate binder used in an amount ranging from 5 to 400 parts by weight per hundred parts by weight of said zinc oxide, and a compound of the general formula (I) used in an amount ranging from 5 to 500 parts by weight per hundred parts by weight of said zinc oxide, ##STR5## in which R 1 , R 2 , R 3 and R 4 independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, or an aryl group, R 5 and R 6 independently represent a hydrogen atom, a substituted or unsubstitued alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, or an aryl group, R 7 , R 8 , R 9 and R 10 independently represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, an alkoxy group or an amino group, and optionally R 5 and R 6 are able to jointly form a saturated or unsaturated hydrocarbon ring having from 3 to 10 carbon atoms.
Claim 3
Dependent Claim
26 words
The electrophotographic photosensitive element according to claim 1, wherein said sensitizing dye is a member selected from the group consisting of xanthene dyes and triphenylmethane dyes.
Claim 4
Dependent Claim
36 words
The electrophotographic photosensitive element according to claim 2, wherein an amount of said sensitizing dye is in the range of 10 -3 to 5 parts by weight per 100 parts by weight of said zinc oxide.
Claim 5
Dependent Claim
22 words
The electrophotographic photosensitive element according to claim 1, further comprising an intermediate layer provided between said conductive support and said photosensitive layer.
Claim 6
Dependent Claim
22 words
The electrophotographic photosensitive element according to claim 6, wherein said intermediate layer is made of casein, polyvinyl pyrrolidone or water-soluble butyral resin.
Claim 7
Dependent Claim
53 words
The electrophotographic photosensitive element according to claim 1, wherein in the formula (I), R 1 , R 2 , R 3 and R 4 independently represent ethyl or benzyl, R 5 , R 8 and R 10 independently represent hydrogen R 6 represents phenyl, and R 7 and R 9 independently represent methyl.
Claim 8
Dependent Claim
78 words
The electrophotographic photosensitive element according to claim 1, wherein said polycarbonate is a polymer having repeating units of the formula ##STR6## in which R represents an unsubstituted phenylene group, a halogen-substituted phenylene group or an alkyl-substituted phenylene group, and R 11 and R 12 independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, or jointly form a saturated or unsaturated hydrocarbon ring having from 3 to 19 carbon atoms.
Claim 9
Dependent Claim
17 words
The electrophotographic photosensitive element as recited in claim 1 wherein the compound of formula (I) is 1,1-bis(4-N,N-diethylamino-2-methylphenyl)-1-(4-N,N-diethylaminophenyl)methane.
Claim 10
Dependent Claim
16 words
The electrophotographic element as recited in claim 1 wherein the compound of formula (I) is 1,1-bis(4-N,N-diethylamino-2-methylphenyl)-1-phenylmethane.
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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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |