US3137574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stability of rapid-processed photographic prints
Assignee: Eastman Kodak Co
•
Filing: 1960-09-29
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Granted: 1964-06-16
•
Expires: 1980-09-29
Abstract
No abstract record available.
Inventors
- 👤 Smith Eric Thomas
- 👤 Williams Leslie Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:20
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/38; G03C5/39; Y; Y10; Y10S; Y10S430/00; Y10S430/164
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A RAPID PROCESS FOR PRODUCING A STABLE VISIBLE IMAGE IN A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER CONTAINING A LATENT IMAGE CONSISTING IN (A) PROCESSING SAID SILVER HALIDE EMULSION LAYER BY DEVELOPING SAID LAYER IN A PHOTOGRAPHIC SILVER HALIDE DEVELOPING SOLUTION AND THEREAFTER STABILIZING SAID SILVER HALIDE EMULSION LAYER BY APPLYING AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE STABILIZING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL THIOCYANATES, ALKALI METAL THIOSULFATES, AMMONIUM THIOCYANATE, AND AMMONIUM THIOSULFATE TO FORM A LIGHTINERT COMPLEX WITH RESULTING UNDEVELOPED SILVER HALIDE, SAID COMPLEX BEING LEFT IN THE EMULSION LAYER, SAID EMULSION LAYER BEING IMBIBED DURING THE PROCESSING WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST 0.05 GRAM PER LITER OF A THIOL COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
121 words
A RAPID PROCESS FOR PRODUCING A STABLE VISIBLE IMAGE IN A PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER CONTAINING A LATENT IMAGE CONSISTING IN (A) PROCESSING SAID SILVER HALIDE EMULSION LAYER BY DEVELOPING SAID LAYER IN A PHOTOGRAPHIC SILVER HALIDE DEVELOPING SOLUTION AND THEREAFTER STABILIZING SAID SILVER HALIDE EMULSION LAYER BY APPLYING AN AQUEOUS SOLUTION CONTAINING AT LEAST ONE STABILIZING COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL THIOCYANATES, ALKALI METAL THIOSULFATES, AMMONIUM THIOCYANATE, AND AMMONIUM THIOSULFATE TO FORM A LIGHTINERT COMPLEX WITH RESULTING UNDEVELOPED SILVER HALIDE, SAID COMPLEX BEING LEFT IN THE EMULSION LAYER, SAID EMULSION LAYER BEING IMBIBED DURING THE PROCESSING WITH AN AQUEOUS SOLUTION CONTAINING AT LEAST 0.05 GRAM PER LITER OF A THIOL COMPOUND HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
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Cited
US2887378A
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US2956876A
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US2933388A
Cited
US2928735A
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US3093479A
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |