US5284714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic support material comprising an antistatic layer and a heat-thickening barrier layer
Assignee: Eastman Kodak Co
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Filing: 1993-02-22
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Granted: 1994-02-08
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Expires: 2013-02-22
Abstract
Abstract A base for a photographic element is provided which comprises a support having disposed thereon a vanadium pentoxide antistatic layer and an overlying barrier layer of a heat-thickening polyacrylamide polymer having hydrophilic functionality, and a method for preparing it.
Inventors
- 👤 Charles C. Anderson
- 👤 Wayne A. Bowman
- 👤 Billy R. Dotson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:17
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/91; G03C1/93; G03C1/85; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31721; Y10T428/31725; Y10T428/31736
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
41 words
A method for preparing a base for a photographic element which comprises coating a support with a vanadium pentoxide antistatic layer and applying an aqueous solution of a heat-thickening polyacrylamide polymer having hydrophilic funtionality as a overlayer on the antistatic layer.
Claim 2
Independent Claim
41 words
A method for preparing a base for a photographic element which comprises coating a support with a vanadium pentoxide antistatic layer and applying an aqueous solution of a heat-thickening polyacrylamide polymer having hydrophilic funtionality as a overlayer on the antistatic layer.
Claim 3
Dependent Claim
23 words
The method of claim 1 which comprises applying a subbing layer to the support and coating the antistatic layer on the subbed support.
Claim 4
Dependent Claim
25 words
The method of claim 1 wherein the aqueous solution contains less than about 50% of the total aqueous medium of a solvent other than water.
Claim 5
Dependent Claim
25 words
The method of claim 3 wherein the aqueous solution contains less than about 20% of the total aqueous medium of a solvent other than water.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |