US4469769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photosensitive material for electrophotography contains halo-benzoquinone sensitizer
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1983-08-02
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Granted: 1984-09-04
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Expires: 2003-08-02
Abstract
Abstract Disclosed is a photosensitive material for the electrophotography, which comprises a dispersion of a charge-generating pigment in a charge-transporting medium composed mainly of a polyvinyl carbazole resin, wherein a perylene pigment represented by the following general formula: ##STR1## wherein R 1 and R 2 stand for a hydrogen atom or a substituted or unsubstituted alkyl or aryl group, is dispersed and incorporated as the charge-generating pigment in an amount of 1 to 40 parts by weight per 100 parts by weight of the polyvinyl carbazole resin and a halogeno-p-benzoquinone is further incorporated in an amount of 1 to 60 parts by weight per 100 parts by weight of the polyvinyl carbazole resin.
Inventors
- 👤 Toru Nakazawa
- 👤 Akira Fushida
- 👤 Yasushi Kamezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:50
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0646; G03G5/0657; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A photosensitive material for the electrophotography, which comprises a dispersion of a charge-generating pigment in a charge-transporting medium composed mainly of a polyvinyl carbazole resin, wherein a perylene pigment represented by the following general formula: ##STR5## wherein R 1 and R 2 stand for a hydrogen atom or a substituted or unsubstituted alkyl or aryl group, is dispersed and incorporated as the charge-generating pigment in an amount of 1 to 40 parts by weight per 100 parts by weight of the polyvinyl carbazole resin and a halogeno-p-benzoquinone is further incorporated in an amount of 1 to 60 parts by weight per 100 parts by weight of the polyvinyl carbazole resin.
Claim 2
Dependent Claim
110 words
A photosensitive material for the electrophotography, which comprises a dispersion of a charge-generating pigment in a charge-transporting medium composed mainly of a polyvinyl carbazole resin, wherein a perylene pigment represented by the following general formula: ##STR5## wherein R 1 and R 2 stand for a hydrogen atom or a substituted or unsubstituted alkyl or aryl group, is dispersed and incorporated as the charge-generating pigment in an amount of 1 to 40 parts by weight per 100 parts by weight of the polyvinyl carbazole resin and a halogeno-p-benzoquinone is further incorporated in an amount of 1 to 60 parts by weight per 100 parts by weight of the polyvinyl carbazole resin.
Claim 3
Dependent Claim
14 words
A photosensitive material as set forth in claim 1, wherein the halogeno-p-benzoquinone is 2,5-dichloro-p-benzoquinone.
Claim 4
Dependent Claim
14 words
A photosensitive material as set forth in claim 1, wherein the halogeno-p-benzoquinone is 2,6-dichloro-p-benzoquinone.
Claim 5
Dependent Claim
35 words
A photosensitive material as set forth in claim 1, wherein the perylene pigment is incorporated in an amount of 4 to 20 parts by weight per 100 parts by weight of the polyvinyl carbazole resin.
Claim 6
Dependent Claim
34 words
A photosensitive material as set forth in claim 1, wherein the halogeno-p-benzoquinone is incorporated in an amount of 4 to 30 parts by weight per 100 parts by weight of the polyvinyl carbazole resin.
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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |