US4192677A
Expired / Lapsed
US
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1,3,4-Oxadiazole derivatives and use thereof
Assignee: Ricoh Co Ltd
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Filing: 1978-11-06
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Granted: 1980-03-11
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Expires: 1998-11-06
Abstract
Abstract 1,3,4-oxadiazole derivative expressed by the general formula ##STR1## wherein R represents alkyl having 1-4 carbon atoms, dialkylamino having 1-4 carbon atoms, diarylamino, phenyl, styryl, halogenophenyl, nitrophenyl, alkylphenyl having 1-4 carbon atoms, alkoxyphenyl having 1-4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl having 1-4 carbon atoms, naphthyl, anthryl, or heterocyclic radical, is a photoconductive substance with high sensitivity and is a compound useful as a constituent of electrophotographic plate.
Inventors
- 👤 Mitsuo Okazaki
- 👤 Akihiro Yamaguchi
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:25
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0622; G03G5/0644; G03G5/0661
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
85 words
An electrophotographic plate comprising an electrically conductive support and a photoconductive layer overlying said electrically conductive support, said photoconductive layer consisting essentially of a mixture of a charge-generating pigment, a compound having the formula ##STR28## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl, anthryl and a binding agent.
Claim 2
Dependent Claim
85 words
An electrophotographic plate comprising an electrically conductive support and a photoconductive layer overlying said electrically conductive support, said photoconductive layer consisting essentially of a mixture of a charge-generating pigment, a compound having the formula ##STR28## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl, anthryl and a binding agent.
Claim 3
Dependent Claim
53 words
An electrophotographic plate according to claim 1, wherein said charge-generating pigment is a member selected from the group consisting of Se, SeTe, SeAs, SeTeAs, CdS, cadmium sulfoselenide, cyanine dye, phthalocyanine dye, disazo dye, indigoid dye, quinacridone dye, polynuclear quinone dye, bisbenzimidazole dye, perylene dye, methine dye, azo dye, xanthene dyd and violanthrone dye.
Claim 4
Dependent Claim
23 words
An electrophotographic plate according to claim 1, wherein the thickness of said photoconductive layer is in the range of about 3 to 50μ.
Claim 5
Dependent Claim
67 words
An electrophotographic plate according to claim 1, wherein said binding agent is a member selected from the group consisting of polyamide, polyurethane, acetal resin, butyral resin, polyester, epoxide resin, alkyd resin, polyketone, polycarbonate, polyvinyl ketone, polystyrene, polyacrylamide, polyethylene, polybutadiene, polyvinyl chloride, maleic resin, acrylic resin, methacrylic resin, silicone resin, poly-N-vinyl carbazole, polyvinyl pyrene, polyvinyl anthracene, polyvinyl benzocarbazole, pyrene-formaldehyde resin, bromopyrene-formaldehyde resin, ethyl carbazole-formaldehyde resin, cellulose and gelatin.
Claim 6
Dependent Claim
35 words
An electrophotographic plate according to claim 1, wherein said compound and said charge-generating pigment are contained in an amount of about 30-80% and about 5-50%, respectively, based on the gross weight of the photoconductive layer.
Claim 7
Dependent Claim
89 words
An electrophotographic plate comprising an electrically conductive support, a charge-generating layer overlying said electrically conductive support and a charge-transport layer overlying said charge-generating layer, said charge-transport layer consisting essentially of a mixture of a compound having the formula ##STR29## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl, anthryl and a binding agent.
Claim 8
Dependent Claim
89 words
An electrophotographic plate comprising an electrically conductive support, a charge-generating layer overlying said electrically conductive support and a charge-transport layer overlying said charge-generating layer, said charge-transport layer consisting essentially of a mixture of a compound having the formula ##STR29## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl, anthryl and a binding agent.
Claim 9
Dependent Claim
54 words
An electrophotographic plate according to claim 6, wherein said charge-generating layer is composed of a member selected from the group consisting of Se, SeAs, SeTe, SeTeAs, cadmium sulfoselenide, phthalocyanine dye, cyanine dye, disazo dye, indigoid dye, quinacridone dye, polynuclear quinone dye, bis-benzimidazole dye, perylene dye, methine dye, azo dye, xanthene dye and violanthrone dye.
Claim 10
Dependent Claim
38 words
An electrophotographic plate according to claim 6, wherein the thickness of said charge-generating layer is in the range of 0.1 to 5μ, and the thickness of said charge-transport layer is in the range of about 3 to 50μ.
Claim 11
Dependent Claim
17 words
An electrophotographic plate according to claim 6, wherein said charge-generating layer is formed by depositing through evaporation.
Claim 12
Dependent Claim
27 words
An electrophotographic plate according to claim 6, wherein the amount of said compound is about 30 to 90% based on the gross weight of said charge-transport layer.
Claim 13
Dependent Claim
67 words
An electrophotographic plate according to claim 6, wherein said binding agent is a member selected from the group consisting of polyamide, polyurethane, acetal resin, butyral resin, polyester, epoxide resin, alkyd resin, polyketone, polycarbonate, polyvinyl ketone, polystyrene, polyacrylamide, polyethylene, polybutadiene, polyvinyl chloride, maleic resin, acrylic resin, methacrylic resin, silicone resin, poly-N-vinyl carbazole, polyvinyl pyrene, polyvinyl anthracene, polyvinyl benzocarbazole, pyrene-formaldehyde resin, bromopyrene-formaldehyde resin, ethyl carbazole-formaldehyde resin, cellulose and gelatin.
Claim 14
Dependent Claim
53 words
A compound having the formula ##STR30## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl and anthryl.
Claim 15
Dependent Claim
53 words
A compound having the formula ##STR30## wherein R is selected from the group consisting of phenyl, halogenophenyl, nitrophenyl, alkylphenyl wherein alkyl has 1 to 4 carbon atoms, alkoxyphenyl wherein alkoxy has 1 to 4 carbon atoms, cyanophenyl, carboxylic ester substituted phenyl, dialkylaminophenyl wherein alkyl has 1 to 4 carbon atoms, naphthyl and anthryl.
Claim 16
Dependent Claim
10 words
A compound according to claim 12 having the formula ##STR31##
Claim 17
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR32##
Claim 18
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR33##
Claim 19
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR34##
Claim 20
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR35##
Claim 21
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR36##
Claim 22
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR37##
Claim 23
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR38##
Claim 24
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR39##
Claim 25
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR40##
Claim 26
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR41##
Claim 27
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR42##
Claim 28
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR43##
Claim 29
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR44##
Claim 30
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR45##
Claim 31
Dependent Claim
10 words
A compound according to claim 12, having the formula ##STR46##
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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) | 1983-03-11 | 1983-09-10 | 1984-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-11 | 1987-09-10 | 1988-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-11 | 1991-09-10 | 1992-03-11 | $7700.00 | Window Closed / Lapsed |