US3615489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of photographic prints with thiocyanate
Assignee: Eastman Kodak Co
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Filing: 1968-06-27
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Granted: 1971-10-26
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Expires: 1988-06-27
Abstract
Abstract A process for the stabilization of photographic images includes subjecting a developed silver halide emulsion layer containing the silver images to thiocyanate stabilization and then laminating an organic colloid layer containing a heavy metal salt on a transparent support to the surface of the emulsion layer. Highly stable glossy prints are obtained.
Inventors
- 👤 Henry J Fassbender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:36
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/39; G03C11/00; G03C11/08; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
The process of claim 1 wherein the heavy metal salt is a zinc salt.
Claim 2
Dependent Claim
29 words
The process of claim 1 wherein from about 15 to 150 mg. of zinc acetate dihydrate per square foot calculated as zinc is present in the organic colloid layer.
Claim 3
Dependent Claim
16 words
The process of claim 2 wherein the developed emulsion layer is coated upon a paper support.
Claim 4
Dependent Claim
16 words
The process of claim 4 wherein the developed emulsion layer is coated upon a film support.
Claim 5
Dependent Claim
22 words
The process of claim 2 wherein the developed emulsion layer is coated on a surface of a hydrophobic polymer coated paper support.
Claim 6
Dependent Claim
55 words
A sheet for lamination to the surface of a thiocyanate stabilized silver halide emulsion layer containing a silver image, comprising a transparent, hydrophobic polymeric support and a hydrophilic organic colloid layer containing about 15 to 150 mg. of a water-soluble zinc salt per square foot calculated as zinc adhered to the surface of said support.
Claim 7
Dependent Claim
38 words
A photographic element comprising a support, a layer thereon containing a thiocyanate and mercaptan stabilized silver image and a hydrophilic organic colloid layer containing a water-soluble heavy metal salt on a transparent support adhered to said first-mentioned layer.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |