Patent US2647057A successfully refreshed from Google Patents.
US2647057A
Expired / Lapsed
US
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Protecting color pictures exposed to high humidities against fading and staining
Assignee: Pavelle Color Inc
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Filing: 1950-10-31
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Granted: 1953-07-28
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Expires: 1970-10-31
Abstract
No abstract record available.
Inventors
- 👤 Seary Eugene
- 👤 Salerno Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:52
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A PROCESS FOR PRODUCING COLOR PHOTOGRAPHIC IMAGES IN SILVER-HALDE EMULSIONS BY EXPOSING THE EMULSIONS, COLOR-FORMING DEVELOPING THE SAME, BLEACHING, FIXING, RINSING AND DRYING, THE IMPROVEMENT WHICH COMPRISES PROLONGING THE LIFE OF THE IMAGE ESPECIALLY WHEN STORED UNDER RELATIVELY HIGH HUMIDITY AND TEMPERATURE CONDITIONS BY MODIFYING SAID RINSING STEP TO INCLUDE RINSING OF THE SAID EMULSION WITH AN AQUEOUS SOLUTION CONTAINING FROM 1% TO 7% OF AN ALKALI FORMALDEHYDE-BISULPHITE AND CONTAINING BORAX FROM 0.5% UP TO THE AMOUNT REQUIRED TO SATURATE SAID SOLUTION.
Claim 2
Dependent Claim
83 words
IN A PROCESS FOR PRODUCING COLOR PHOTOGRAPHIC IMAGES IN SILVER-HALDE EMULSIONS BY EXPOSING THE EMULSIONS, COLOR-FORMING DEVELOPING THE SAME, BLEACHING, FIXING, RINSING AND DRYING, THE IMPROVEMENT WHICH COMPRISES PROLONGING THE LIFE OF THE IMAGE ESPECIALLY WHEN STORED UNDER RELATIVELY HIGH HUMIDITY AND TEMPERATURE CONDITIONS BY MODIFYING SAID RINSING STEP TO INCLUDE RINSING OF THE SAID EMULSION WITH AN AQUEOUS SOLUTION CONTAINING FROM 1% TO 7% OF AN ALKALI FORMALDEHYDE-BISULPHITE AND CONTAINING BORAX FROM 0.5% UP TO THE AMOUNT REQUIRED TO SATURATE SAID SOLUTION.
References Cited (Backward Citations)
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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) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |