US4088484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 1,3,4-oxadiazole and electrophotographic elements containing same
Assignee: Ricoh Co Ltd
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Filing: 1977-04-04
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Granted: 1978-05-09
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Expires: 1997-04-04
Abstract
Abstract 1,3,4-OXADIAZOLE DERIVATIVES EXPRESSED BY THE GENERAL FORMULA <IMAGE> wherein R represents cyanophenyl, nitrophenyl, dialkylaminophenyl (wherein alkyl has 1-4 carbon atoms), julolidyl, N-alkylcarbazolyl (wherein alkyl has 1-4 carbon atoms) or ferrocenyl radical, are photoconductive substances possessing high sensitivity and are compounds useful as a constituent of electrophotographic plates.
Inventors
- 👤 Mitsuo Okazaki
- 👤 Akihiro Yamaguchi
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:23
CPC Classifications
C; C07; C07D; C07D271/00; C07D271/02; C07D271/10; C07D455/00; C07D455/02; C07F; C07F17/00; C07F17/02; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/0674
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
19 words
A compound having the formula ##STR10## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 2
Dependent Claim
19 words
A compound having the formula ##STR10## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 3
Dependent Claim
12 words
A compound according to claim 1 in which said alkyl is ethyl.
Claim 4
Dependent Claim
11 words
A compound according to claim 1 in which R is 3-(n-ethyl)carbazolyl.
Claim 5
Dependent Claim
55 words
In an electrophotographic plate comprising a conductive support and a photosensitive layer on said support, said photosensitive layer consisting essentially of charge-generating pigment, charge-transport material and binder agent, the improvement which comprises: said charge-transport material is a compound having the formula ##STR11## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 6
Dependent Claim
55 words
In an electrophotographic plate comprising a conductive support and a photosensitive layer on said support, said photosensitive layer consisting essentially of charge-generating pigment, charge-transport material and binder agent, the improvement which comprises: said charge-transport material is a compound having the formula ##STR11## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 7
Dependent Claim
13 words
An electrophotographic plate according to claim 4 in which said alkyl is ethyl.
Claim 8
Dependent Claim
12 words
An electrophotographic plate according to claim 4 in which R is 3-(N-ethyl)carbazolyl.
Claim 9
Dependent Claim
48 words
A plate according to claim 4, wherein said charge-generating pigment is a member selected from the group consisting of Se, SeAs, SeTe, SeTeAs, CdS, cadmium sulfoselenide, cyanine dye, phthalocyanine dye, disazo dye, indigoid dye, quinacridone dye, polynuclear quinone dye, bis-benzimidazole dye, perylene dye, methine dye and violanthrone dye.
Claim 10
Dependent Claim
61 words
In an electrophotographic plate comprising a conductive support, a charge-generating layer on said support and a charge-transport layer on said charge-generating layer, said charge-transport layer consisting essentially of a charge-transport material and binder agent, the improvement which comprises: said charge-transport material is a compound having the formula ##STR12## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 11
Dependent Claim
61 words
In an electrophotographic plate comprising a conductive support, a charge-generating layer on said support and a charge-transport layer on said charge-generating layer, said charge-transport layer consisting essentially of a charge-transport material and binder agent, the improvement which comprises: said charge-transport material is a compound having the formula ##STR12## wherein R is N-alkylcarbazolyl, said alkyl having from one to 4 carbon atoms.
Claim 12
Dependent Claim
13 words
An electrophotographic plate according to claim 8 in which said alkyl is ethyl.
Claim 13
Dependent Claim
12 words
An electrophotographic plate according to claim 8 in which R is 3-(N-ethyl)carbazolyl.
Claim 14
Dependent Claim
52 words
A plate according to claim 8, wherein said charge-generating layer comprises a member selected from the group consisting of Se, SeAs, SeTe, SeTeAs, CdS, cadmium sulfoselenide, phthalocyanine dye, disazo dye, indigoid dye, quinacridone dye, polynuclear quinone dye, bis-benzimidazoic dye, perylene dye, violanthrone dye, cyanine dye, methine dye, azo dye and xanthene dye.
Claim 15
Dependent Claim
29 words
A plate according to claim 8, wherein said charge-generating layer has a thickness of about 5-0.1μ, and said charge-transport layer has a thickness in the range of about 3-50μ.
Claim 16
Dependent Claim
16 words
A plate according to claim 8, wherein said charge-generating layer is formed by depositing through evaporation.
References Cited (Backward Citations)
US4012376A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |