Patent US2640776A successfully refreshed from Google Patents.
US2640776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitized photographic emulsion containing color couplers
Assignee: Eastman Kodak Co
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Filing: 1947-08-29
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Granted: 1953-06-02
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Expires: 1967-08-29
Abstract
No abstract record available.
Inventors
- 👤 Spence John
- 👤 Burt H Carroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:21
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39292; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A SENSITIVE SILVER HALIDE EMULSION FOR COLOR PHOTOGRAPHY SELECTED FROM THE GROUP CONSISTING OF (I) A RED SENSITIVE SILVER HALIDE EMULSION CONTAINING DISPERSED THEREIN FINELY DIVIDED LIQUID PARTICLES OF A MIXTURE OF A PHENOLIC COLOR-FORMER FOR THE CYAN IMAGE CAPABLE OF FORMING A QUINONEIMINE DYE WITH A PHENYLENEDIAMINE DEVELOPER, AND A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC, CRYSTALLOIDAL MATERIAL HAVING A BOILING POINT HAVING ABOUT 175* C., SAID CRYSTALLOIDAL MATERIAL HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMER AND FOR THE DYE FORMED THEREFROM, AND BEING PERMEABLE TO PHOTOGRAPHIC PROCESSING SOLUTIONS, THE NATURE AND PROPORTIONS OF THE COLOR-FORMER AND CRYSTALLOIDAL MATERIAL BEING SO CHOSEN THAT PARTICLES THEREOF ARE LIQUID UNDER CONDITIONS OF COATING AND PROCESSING THE EMULSION, SAID RED SENSITIVE EMULSION BEING SENSITIZED TO THE RED WITH AT LEAST ONE SENSITIZING DYE SELECTED FROM THE GROUP CONSISTING OF THOSE DYES REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 2
Dependent Claim
146 words
A SENSITIVE SILVER HALIDE EMULSION FOR COLOR PHOTOGRAPHY SELECTED FROM THE GROUP CONSISTING OF (I) A RED SENSITIVE SILVER HALIDE EMULSION CONTAINING DISPERSED THEREIN FINELY DIVIDED LIQUID PARTICLES OF A MIXTURE OF A PHENOLIC COLOR-FORMER FOR THE CYAN IMAGE CAPABLE OF FORMING A QUINONEIMINE DYE WITH A PHENYLENEDIAMINE DEVELOPER, AND A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC, CRYSTALLOIDAL MATERIAL HAVING A BOILING POINT HAVING ABOUT 175* C., SAID CRYSTALLOIDAL MATERIAL HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMER AND FOR THE DYE FORMED THEREFROM, AND BEING PERMEABLE TO PHOTOGRAPHIC PROCESSING SOLUTIONS, THE NATURE AND PROPORTIONS OF THE COLOR-FORMER AND CRYSTALLOIDAL MATERIAL BEING SO CHOSEN THAT PARTICLES THEREOF ARE LIQUID UNDER CONDITIONS OF COATING AND PROCESSING THE EMULSION, SAID RED SENSITIVE EMULSION BEING SENSITIZED TO THE RED WITH AT LEAST ONE SENSITIZING DYE SELECTED FROM THE GROUP CONSISTING OF THOSE DYES REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
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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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |