US2787544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making photographic packet emulsions
Assignee: Eastman Kodak Co
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Filing: 1954-12-20
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Granted: 1957-04-02
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Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 Godowsky Leopold
- 👤 Jerome J Duane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:17
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A PHOTOGRAPHIC PACKET EMULSION WHICH COMPRISES MIXING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, WITH A LOW BOILING WATER-INSOLUBLE ORGANIC SOLVENT FOR THE COLOR-FORMING COMPOUND, SAID LOW-BOILING SOLVENT HAVING A BOILING POINT BELOW 125%C., DISPERSING THE SOLUTION OF COLOR-FORMING COMPOUND AND LOW BOILING ORGANIC SOLVENT IN GELATIN, MIXING THE COLORFORMER DISPERSION WITH A GELATINO-SILVER HALIDE EMULSION FORMING IN A GELATIN CONTINUOUS PHASES, A PACKET DISPERSION OF SAID EMULSION AND COLOR-FORMER, AND THEN MIXING SAID PACKET DISPERSION WITH A SOLUTION OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT ORGANIC CRYSTALLOIDAL SOLVENT FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND WHICH SOLVENT HAS A BOILING POINT ABOVE ABOUT 175*C. AND IS PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, TO FORM A PACKET DISPERSION OF SAID COLOR-FORMING COMPOUND CONTAINING SAID CRYSTALLOIDAL SOLVENT.
Claim 2
Independent Claim
145 words
THE METHOD OF INCORPORATING A COLOR FORMER IN A PHOTOGRAPHIC PACKET EMULSION WHICH COMPRISES MIXING A COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH A PRIMARY AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT, WITH A LOW BOILING WATER-INSOLUBLE ORGANIC SOLVENT FOR THE COLOR-FORMING COMPOUND, SAID LOW-BOILING SOLVENT HAVING A BOILING POINT BELOW 125%C., DISPERSING THE SOLUTION OF COLOR-FORMING COMPOUND AND LOW BOILING ORGANIC SOLVENT IN GELATIN, MIXING THE COLORFORMER DISPERSION WITH A GELATINO-SILVER HALIDE EMULSION FORMING IN A GELATIN CONTINUOUS PHASES, A PACKET DISPERSION OF SAID EMULSION AND COLOR-FORMER, AND THEN MIXING SAID PACKET DISPERSION WITH A SOLUTION OF A SUBSTANTIALLY WATER-INSOLUBLE, LOW MOLECULAR WEIGHT ORGANIC CRYSTALLOIDAL SOLVENT FOR THE COLOR-FORMING COMPOUND AND FOR DYES FORMED THEREFROM, AND WHICH SOLVENT HAS A BOILING POINT ABOVE ABOUT 175*C. AND IS PERMEABLE TO PHOTOGRAPHIC DEVELOPER OXIDATION PRODUCTS, TO FORM A PACKET DISPERSION OF SAID COLOR-FORMING COMPOUND CONTAINING SAID CRYSTALLOIDAL SOLVENT.
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |