US6096491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic layer for imaging element
Assignee: Eastman Kodak Co
•
Filing: 1998-10-15
•
Granted: 2000-08-01
•
Expires: 2018-10-15
Abstract
Abstract The present invention is an imaging element which includes a support, an image-forming layer superposed on the support, an electrically-conductive layer superposed on the support and a protective topcoat overlying the electrically-conductive layer. The electrically-conductive layer contains an electrically-conductive polymer and has a water electrode resistivity (WER) value that is substantially unchanged upon subjecting of the imaging element to color photographic processing. The protective topcoat is composed of a polyurethane film-forming binder having a tensile elongation to break of at least 50% and a Young's modulus measured at 2% elongation of at least 50000 psi.
Inventors
- 👤 Debasis Majumdar
- 👤 Dennis J. Eichorst
- 👤 Kenneth L. Tingler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:07
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/7614; G03C1/85; G03C1/89; G03C1/775; G03C1/79; G03C1/795; G03C1/7954; G03C2001/7635; G03C2001/7952
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
93 words
An imaging element comprising: a support; an image-forming layer superposed on the support; an electrically-conductive layer superposed on the support; said electrically-conductive layer comprising 3,4-dialkoxysubstituted polythiophene styrene sulfonate; and a protective topcoat overlying the electrically-conductive layer, said topcoat comprising a non-crosslinked aliphatic polyurethane film-forming binder having a tensile elongation to break of at least 50% and a Young's modulus measured at 2% elongation of at least 50000 psi; wherein said electrically-conductive layer has a water electrode resistivity (WER) value that is substantially unchanged upon subjecting of said imaging element to color photographic processing.
Claim 2
Dependent Claim
93 words
An imaging element comprising: a support; an image-forming layer superposed on the support; an electrically-conductive layer superposed on the support; said electrically-conductive layer comprising 3,4-dialkoxysubstituted polythiophene styrene sulfonate; and a protective topcoat overlying the electrically-conductive layer, said topcoat comprising a non-crosslinked aliphatic polyurethane film-forming binder having a tensile elongation to break of at least 50% and a Young's modulus measured at 2% elongation of at least 50000 psi; wherein said electrically-conductive layer has a water electrode resistivity (WER) value that is substantially unchanged upon subjecting of said imaging element to color photographic processing.
Claim 3
Dependent Claim
24 words
The imaging element of claim 1 wherein the support is selected from the group consisting of cellulose esters, polyesters, polyolefins, paper and polymer-coated paper.
Claim 4
Dependent Claim
39 words
The imaging element of claim 1 wherein said electrically-conductive layer comprises a dry coverage of about 10 mg/m 2 to 300 mg/m 2 and said polyurethane in said topcoat comprises a dry coverage of about 500 mg/m 2 .
Claim 5
Dependent Claim
33 words
The imaging element of claim 1 wherein the electrically-conducting layer further comprises a polymeric film-forming binder selected from the group consisting of water soluble polymers, synthetic latex polymers and water dispersible condensation polymers.
Claim 6
Dependent Claim
19 words
The imaging element of claim 4 wherein the electronically-conductive polymer to binder weight ratio is from 100:0 to 0.1:99.9.
Claim 7
Dependent Claim
24 words
The imaging element of claim 1 wherein the electrically-conducting layer comprises a dry coverage of from 1 mg/m 2 to 5 g/m 2 .
Claim 8
Dependent Claim
15 words
The imaging element of claim 1 wherein the electrically-conducting layer further comprises a coating aid.
Claim 9
Dependent Claim
24 words
The imaging element of claim 1 wherein the electrically-conducting layer further comprises co-binders, thickeners, coalescing aids, particle dyes, antifoggants, charge control agents or biocides.
Claim 10
Dependent Claim
27 words
The imaging element of claim 1 wherein the protective topcoat further comprises co-binders, thickeners, coalescing aids, matting agents, lubricants, particle dyes, antifoggants, charge control agents or biocides.
Claim 11
Dependent Claim
19 words
The imaging element of claim 1 wherein said water electrode resistivity (WER) value is less than 9 log ohms/square.
Claim 12
Dependent Claim
26 words
The imaging element of claim 1 wherein said polyurethane in said topcoat comprises a dry coverage of about 50 mg/m 2 to 5 g/m 2 .
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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) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |