Patent US3765882A successfully refreshed from Google Patents.
US3765882A
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Heterocyclic photoconductor containing o, s or se
Assignee: Eastman Kodak Co
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Filing: 1972-08-07
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Granted: 1973-10-16
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Expires: 1992-08-07
Abstract
Abstract Compounds useful in electrophotography as part of photoconductive elements are disclosed having the general formula: WHEREIN Z is a sulfur, oxygen or selenium hetero atom and R1 through R4 each represent a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group or a halogen atom and Y represents the group -(CH CH)n-R in which n equals 0, 1 or 2 and R is an aryl radical.
Inventors
- 👤 R Virkhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:30
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/50; C07D333/52; C07D333/62; C07D333/64; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
13 words
An electrophotographic element according to claim 1 wherein Z is a sulfur atom.
Claim 2
Dependent Claim
15 words
An electrophotographic element according to claim 2 wherein R1 through R4 are each hydrogen atoms.
Claim 3
Dependent Claim
26 words
An electrophotographic element comprising an electrically conductive support bearing a photoconductive composition comprising an electrically insulating film-forming polymeric binder and an organic photoconductor having the formula:
Claim 4
Dependent Claim
27 words
An electrophotographic element according to claim 4 wherein the organic photoconductor is selected from the group consisting of 2-(p-diphenylaminobenzylidene)-benzo-(b)thiophen-3-one, 2-(p-di-p-tolylaminobenzylidene)-benzo(b)-thiophen-3-one, 2-(p-dimethylaminocinnamylidene)-benzo(b)-thiophen-3-one, 2-(p-diphenylamino-o-methoxybenzylidene)-benzo-(b)thiophen-3-one, 2-(4-diphenylamino-1-naphthylidene)-benzo-(b)thiophen-3-one, 2-(p-phenylbenzylidene)-benzo(b)thiophen-3-one, 2-(p-diethylaminobenzylidene)benzo(b)thiophen-3-one, and 2-(p-methoxybenzylidene)-benzo(b)thiophen-3-one.
Claim 5
Dependent Claim
21 words
An electrophotographic element according to claim 4 wherein the photoconductive composition is selected from the group consisting of 2-(p-diphenylaminobenzylidene)-benzo(b)-thiophen-3-one and 2-(p-di-p-tolylaminobenzylidene)-benzo(b)-thiophen-3-one.
Claim 6
Dependent Claim
33 words
An electrophotographic element according to claim 1 wherein the photoconductive composition comprises from about 0.005 percent to about 5 percent by weight based on said photoconductive composition of a sensitizer for said composition.
Claim 7
Dependent Claim
26 words
In an electrophotographic process wherein an electrostatic charge pattern is formed on an electrophotographic element, the improvement wherein said element is the element of claim 4.
Claim 8
Dependent Claim
2 words
A 2-(p-diphenylaminobenzylidene)benzo(b)thiophen-3-one.
Claim 9
Dependent Claim
2 words
A 2-(p-dimethylaminocinnamylidene)benzo(b)-thiophen-3-one.
Claim 10
Dependent Claim
2 words
A 2-(p-diphenylamino-o-methoxybenzylidene)-benzo(b)thiophen-3-one.
Claim 11
Dependent Claim
2 words
A 2-(4-diphenylamino-1-naphthylidene)benzo(b)-thiophen-3-one.
Claim 12
Dependent Claim
2 words
A 2-(p-di-p-tolylaminobenzylidene)benzo(b)-thiophen-3-one.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |