US4134761A
Expired / Lapsed
US
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3-(9-Fluorenylidene)carbazole derivatives and electrophotographic light-sensitive material containing same
Assignee: Ricoh Co Ltd
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Filing: 1977-04-07
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Granted: 1979-01-16
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Expires: 1997-04-07
Abstract
Abstract 3-(-FLUORENYLIDENE)CARBAZOLE DERIVATIVES, PROCESS FOR PREPARING SAME AND ELECTROPHOTOGRAPHIC LIGHT-SENSITIVE MATERIAL CONTAINING 3-(9-FLUORENYLIDENE)CARBAZOLE DERIVATIVES.
Inventors
- 👤 Mitsuo Okazaki
- 👤 Akihiro Yamaguchi
- 👤 Akio Kozima
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:40
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/86; G03G5/0601; G03G5/0605
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
3-(9-fluorenylidene)carbazole derivatives having the formula (I): ##STR6## wherein R is a lower alkyl group of from 1 to 4 carbon atoms.
Claim 2
Dependent Claim
21 words
3-(9-fluorenylidene)carbazole derivatives having the formula (I): ##STR6## wherein R is a lower alkyl group of from 1 to 4 carbon atoms.
Claim 3
Dependent Claim
14 words
3-(9-fluorenylidene)carbazole derivative according to claim 1 wherein said derivative has the formula (II): ##STR7##
Claim 4
Dependent Claim
103 words
An electrophotographic light-sensitive material comprising an electrically conductive support, a photoconductive layer on said electrically conductive support, said photoconductive layer having a thickness of 3 to 50μ, said photoconductive layer consisting essentially of from 30 to 80% by weight of a charge transport compound having the formula ##STR8## wherein R is alkyl having 1 to 4 carbon atoms, from 5 to 50% by weight of charge generating substance selected from the group consisting of cyanine dye, phthalocyanine, disazo, indigoid, quinacridone, polynuclear quinone, bis-benzimidazole, perylene, methine dye, azo dye, xanthene dye and violanthrone, and the balance is an insulating organic high molecular weight compound.
Claim 5
Dependent Claim
103 words
An electrophotographic light-sensitive material comprising an electrically conductive support, a photoconductive layer on said electrically conductive support, said photoconductive layer having a thickness of 3 to 50μ, said photoconductive layer consisting essentially of from 30 to 80% by weight of a charge transport compound having the formula ##STR8## wherein R is alkyl having 1 to 4 carbon atoms, from 5 to 50% by weight of charge generating substance selected from the group consisting of cyanine dye, phthalocyanine, disazo, indigoid, quinacridone, polynuclear quinone, bis-benzimidazole, perylene, methine dye, azo dye, xanthene dye and violanthrone, and the balance is an insulating organic high molecular weight compound.
Claim 6
Dependent Claim
120 words
An electrophotographic light-sensitive material comprising an electrically conductive support, a first layer on said support, said first layer having a thickness of from 1 to 5μ and consisting essentially of charge generating substance selected from the group consisting of Se, Se-Te alloy, Se-Te-As alloy, Zno, CdS, cadmium sulfoselenide, cyanine dye, phthalocyanine, disazo, indigoid, quinacridone, polynuclear quinone, bis-benzimidazole, perylene, methine dye, azo dye, xanthene dye and violanthrone, and a charge transport layer on said first layer, said charge transport layer having a thickness of from 3 to 50μ and consisting essentially of a charge transport substance and an insulating organic high molecular compound, said charge transport substance having the formula ##STR9## wherein R is alkyl having 1 to 4 carbon atoms.
Claim 7
Dependent Claim
120 words
An electrophotographic light-sensitive material comprising an electrically conductive support, a first layer on said support, said first layer having a thickness of from 1 to 5μ and consisting essentially of charge generating substance selected from the group consisting of Se, Se-Te alloy, Se-Te-As alloy, Zno, CdS, cadmium sulfoselenide, cyanine dye, phthalocyanine, disazo, indigoid, quinacridone, polynuclear quinone, bis-benzimidazole, perylene, methine dye, azo dye, xanthene dye and violanthrone, and a charge transport layer on said first layer, said charge transport layer having a thickness of from 3 to 50μ and consisting essentially of a charge transport substance and an insulating organic high molecular compound, said charge transport substance having the formula ##STR9## wherein R is alkyl having 1 to 4 carbon atoms.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |