US2913338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of cyan dye fading in color developed prints and films
Assignee: GAF Chemicals Corp
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Filing: 1957-01-10
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Granted: 1959-11-17
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Expires: 1977-01-10
Abstract
No abstract record available.
Inventors
- 👤 James E Bates
- 👤 Carl E Johnson
- 👤 Donald E Tritten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:36
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
IN THE PROCESS OF PRODUCING STABILIZED CYAN COLOR PHOTOGRAPHIC IMAGES IN A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT AND AT LEAST ONE LIGHT SENSITIVE SILVER-HALIDE EMULSION CONTAINING A PHENOLIC COLOR FORMER FAST TO DIFFUSION CAPABLE OF FORMING, UPON DEVELOPMENT WITH A PRISMARY AMINO DEVELOPER, A CYAN QUINONEIMINE DYE IMAGE BY EXPOSING SAID MULTILAYER MATERIAL, COLOR DEVELOPING BLEACHING, FIXING, AND WASHING THE SAME, THE IMPROVEMENT WHICH CONSISTS OF AVOIDING CYAN DYE FADING BY TREATING THE SAID MATERIAL AFTER THE FINAL WASHING OPERATION WITH A WATER SOLUTION CONTAINING 1 TO 50 GRAMS PER LITER OF A WATER SOLUBLE SALT OF A METAL SELECTED FROM THE CLASS COMSISTING OF CALCIUM, MAGNESIUM, AND CADMIUM.
Claim 2
Dependent Claim
109 words
IN THE PROCESS OF PRODUCING STABILIZED CYAN COLOR PHOTOGRAPHIC IMAGES IN A PHOTOGRAPHIC MATERIAL COMPRISING A SUPPORT AND AT LEAST ONE LIGHT SENSITIVE SILVER-HALIDE EMULSION CONTAINING A PHENOLIC COLOR FORMER FAST TO DIFFUSION CAPABLE OF FORMING, UPON DEVELOPMENT WITH A PRISMARY AMINO DEVELOPER, A CYAN QUINONEIMINE DYE IMAGE BY EXPOSING SAID MULTILAYER MATERIAL, COLOR DEVELOPING BLEACHING, FIXING, AND WASHING THE SAME, THE IMPROVEMENT WHICH CONSISTS OF AVOIDING CYAN DYE FADING BY TREATING THE SAID MATERIAL AFTER THE FINAL WASHING OPERATION WITH A WATER SOLUTION CONTAINING 1 TO 50 GRAMS PER LITER OF A WATER SOLUBLE SALT OF A METAL SELECTED FROM THE CLASS COMSISTING OF CALCIUM, MAGNESIUM, AND CADMIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |