Patent US3403277A successfully refreshed from Google Patents.
Patent US2378847A successfully refreshed from Google Patents.
Patent US4485161A successfully refreshed from Google Patents.
US4485161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic elements having barrier layers of crosslinked polymers of aliphatic or aromatic monomers containing α,β-ethylenically unsaturated carbonyl-containing substituents
Assignee: Eastman Kodak Co
•
Filing: 1983-06-20
•
Granted: 1984-11-27
•
Expires: 2003-06-20
Abstract
Abstract An electrophotographic element comprising a conductive layer, a photoconductive layer and a barrier layer between the conductive layer and the photoconductive layer characterized in that the barrier layer comprises a polymerized crosslinked monomer having an aliphatic or aromatic group comprising at least one α, β-ethylenically unsaturated carbonyl-containing substituent is disclosed.
Inventors
- 👤 Michael Scozzafava
- 👤 Michel F. Molaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:46
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/14; G03G5/142
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
An electrophotographic element comprising a conductive layer, a organic photoconductive layer and a barrier layer between the conductive layer and the photoconductive layer characterized in that the barrier layer is capable of supporting an electric field in excess of 6×10 5 v/cm and comprises a polymerized crosslinked monomer having the structure ##STR10## wherein R 15 a cycloaliphatic or aromatic group; R 1 15 represents hydrogen or alkyl; R 2 15 alkylene of 1 to 20 carbon atoms, or --CH 2 CH 2 (OCH 2 CH 2 )n; p is 0 or 1; m is 1 to 6; and n is 1 to 20.
Claim 2
Dependent Claim
103 words
An electrophotographic element comprising a conductive layer, a organic photoconductive layer and a barrier layer between the conductive layer and the photoconductive layer characterized in that the barrier layer is capable of supporting an electric field in excess of 6×10 5 v/cm and comprises a polymerized crosslinked monomer having the structure ##STR10## wherein R 15 a cycloaliphatic or aromatic group; R 1 15 represents hydrogen or alkyl; R 2 15 alkylene of 1 to 20 carbon atoms, or --CH 2 CH 2 (OCH 2 CH 2 )n; p is 0 or 1; m is 1 to 6; and n is 1 to 20.
Claim 3
Dependent Claim
27 words
The electrophotographic element of claim 1, wherein the barrier layer comprises a polymerized crosslinked monomer having the formula: ##STR11## in which n is from 2 to 6.
Claim 4
Dependent Claim
17 words
The elements of claims 1 or 2 wherein the photoconductive layer comprises a bispyrylium dye and tri-p-tolylamine.
Claim 5
Dependent Claim
23 words
The elements of claims 1 or 2 wherein the conducting layer is selected from the group consisting of cuprous iodide, nickel and cermet.
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) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |