US2949360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color former dispersions
Assignee: Eastman Kodak Co
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Filing: 1956-08-31
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Granted: 1960-08-16
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Expires: 1976-08-31
Abstract
No abstract record available.
Inventors
- 👤 Donald B Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:00
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
216 words
THE METHOD OF INCORPORATING A COLOR COUPLER IN A GELATINO-SILVER HALIDE EMULSION, WHICH COMPRISES DISSOLVING A WATER-INSOLUBLE COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT TO FORM A DYE, IN A SOLVENT INCLUDING (A) AT LEAST AN AUXILIARY SOLVENT HAVING A SOLUBILITY OF AT LEAST 2.5 PARTS OF SOLVENT IN 100 PARTS OF WATER AND NOT MORE THAN 100 PARTS OF SOLVENT IN 100 PARTS OF WATER, SAID AUXILIARY SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ETHYL ACETATE, ISOPROPYL ACETATE, ETHYL-PROPIONATE, B-ETHOXYETHYL ACETATE, B-BUTOXYETHYL B-ETHOXYETHYL ACETATE, METHYL-N-PROPYL KETONE AND DI-TETRAHYDROFURFURYL) ADIPATE AND (B) LESS THAN ABOUT ONE PART PER PART OF COLOR-FORMING COMPOUND OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC CRYSTALLOIDAL SOLVENT FOR THE COLOR-FORMING COMPOUND, SAID CRYSTALLOIDAL SOLVENT HAVING A BOILING POINT ABOVE ABOUT 175*C. AND A SOLUBILITY OF LESS THAN ABOUT 0.1 PART OF SOLVENT IN 100 PARTS OF WATER AND HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND VEING PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, DISPERSING THE SOLUTION IN AQUEOUS GELATIN PREVIOUSLY APPROXIMATELY SATURATED WITH AT LEAST ONE OF SAID AUXILIARY SOLVENTS, CHILLING AND SETTING THE GELATIN DISPERSION, REMOVING SUBSTANTIALLY ALL OF SAID AUXILIARY SOLVENT FROM THE DISPERSION AND MIXING THE DISPERSION WITH A GELATINO-SILVER HALIDE EMULSION.
Claim 2
Independent Claim
216 words
THE METHOD OF INCORPORATING A COLOR COUPLER IN A GELATINO-SILVER HALIDE EMULSION, WHICH COMPRISES DISSOLVING A WATER-INSOLUBLE COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT TO FORM A DYE, IN A SOLVENT INCLUDING (A) AT LEAST AN AUXILIARY SOLVENT HAVING A SOLUBILITY OF AT LEAST 2.5 PARTS OF SOLVENT IN 100 PARTS OF WATER AND NOT MORE THAN 100 PARTS OF SOLVENT IN 100 PARTS OF WATER, SAID AUXILIARY SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF ETHYL ACETATE, ISOPROPYL ACETATE, ETHYL-PROPIONATE, B-ETHOXYETHYL ACETATE, B-BUTOXYETHYL B-ETHOXYETHYL ACETATE, METHYL-N-PROPYL KETONE AND DI-TETRAHYDROFURFURYL) ADIPATE AND (B) LESS THAN ABOUT ONE PART PER PART OF COLOR-FORMING COMPOUND OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT, ORGANIC CRYSTALLOIDAL SOLVENT FOR THE COLOR-FORMING COMPOUND, SAID CRYSTALLOIDAL SOLVENT HAVING A BOILING POINT ABOVE ABOUT 175*C. AND A SOLUBILITY OF LESS THAN ABOUT 0.1 PART OF SOLVENT IN 100 PARTS OF WATER AND HAVING A HIGH SOLVENT ACTION FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND VEING PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, DISPERSING THE SOLUTION IN AQUEOUS GELATIN PREVIOUSLY APPROXIMATELY SATURATED WITH AT LEAST ONE OF SAID AUXILIARY SOLVENTS, CHILLING AND SETTING THE GELATIN DISPERSION, REMOVING SUBSTANTIALLY ALL OF SAID AUXILIARY SOLVENT FROM THE DISPERSION AND MIXING THE DISPERSION WITH A GELATINO-SILVER HALIDE EMULSION.
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) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |