US4438187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive composition for electrophotography with chloronaphthoquinones
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1982-04-07
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Granted: 1984-03-20
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Expires: 2002-04-07
Abstract
Abstract Disclosed is a photosensitive composition for electrophotography, which comprises 100 parts by weight of polyvinyl carbazole, 5 to 50 parts by weight of a perylene pigment and 5 to 50 parts by weight of a halonaphthoquinone.
Inventors
- 👤 Akira Fushida
- 👤 Yoshiaki Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:45
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0657; G03G5/0601; G03G5/0609; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A photosensitive plate for electrophotography, consisting essentially of an electrically conductive support and a photosensitive layer thereon, said photosensitive layer comprising 100 parts by weight of polyvinylcarbazole, 10 to 30 parts by weight of a perylene pigment represented by the following general formula ##STR3## wherein R 1 and R 2 is a hydrogen atom or a substituted or unsubstituted alkyl or aryl group, and 10 to 30 parts by weight of 2,3-dichloro-1,4-naphthoquinone.
Claim 2
Dependent Claim
72 words
A photosensitive plate for electrophotography, consisting essentially of an electrically conductive support and a photosensitive layer thereon, said photosensitive layer comprising 100 parts by weight of polyvinylcarbazole, 10 to 30 parts by weight of a perylene pigment represented by the following general formula ##STR3## wherein R 1 and R 2 is a hydrogen atom or a substituted or unsubstituted alkyl or aryl group, and 10 to 30 parts by weight of 2,3-dichloro-1,4-naphthoquinone.
Claim 3
Dependent Claim
17 words
A photosensitive plate as set forth in claim 1 wherein the perylene pigment is N,N'-di(3,5-dimethylphenyl)perylene-3,4,9,10-tetracarboxylic acid diimide.
Claim 4
Dependent Claim
40 words
A photosensitive plate as set forth in claim 1 wherein said photosensitive layer further comprises a phthalocyanine pigment or disazo pigment in an amount of 2 to 10 parts by weight per 100 parts by weight of the perylene pigment.
Claim 5
Dependent Claim
39 words
A photosensitive plate as set forth in claim 1 wherein said photosensitive layer further comprises a resin binder having no photoconductivity in an amount of 0.1 to 50 parts by weight per 100 parts by weight of polyvinyl carbazole.
Claim 6
Dependent Claim
36 words
A photosensitive plate as set forth in claim 1 wherein said photosensitive layer further comprises a leveling agent in an amount of 0.005 to 5 parts by weight per 100 parts by weight of polyvinyl carbazole.
Claim 7
Dependent Claim
22 words
A photosensitive plate as set forth in claim 1 wherein said photosensitive layer has a thickness of from 3 to 30 microns.
Claim 8
Dependent Claim
22 words
A photosensitive plate as set forth in claim 1 wherein said photosensitive layer has a thickness of from 8 to 15 microns.
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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |