US2965484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixed packet photographic emulsions
Assignee: GAF Chemicals Corp
•
Filing: 1956-03-26
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Granted: 1960-12-20
•
Expires: 1976-03-26
Abstract
No abstract record available.
Inventors
- 👤 Tulagin Vsevolod
- 👤 Robert D Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:19
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION COMPRISING A HYDROPHILIC COLLOID CARRIER HAVING DISPERSED THERETHROUGH IMMOBILE PACKETS OF AN OILY, NON-WATER MISCIBLE SOLVENT SURROUNDING LIGHT-SENSITIVE SILVER HALIDE GRAINS WHICH HAVE BEEN RENDERED HYDROPHOBIC BY TREATING A LIGHT-SENSITIVE GELATIN SILVER HALIDE PHOTOGRAPHIC EMULSION WITH A PROTEOLYTIC ENZYME IN ORDER TO DIGEST THE GELATIN CARRIER AND PRODUCE SILVER HALIDE GRAINS EACH SURROUNDED BY A HULL OF ADSORBED GELATIN, SEPARATING THE LIGHT-SENSITIVE GRAINS AND THEIR ABSORBED GELATIN HULLS FROM THE DIGESTED GELATIN AND TREATING BY INTIMATELY ASSOCIATING THE GELATIN HULLS AND SAID GRAINS WITH AN ALIPHATIC COMPOUND HAVING AS HYDROCARBON CHAIN OF AT LEAST 10 CARBON ATOMS AND A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF ACID ANHYDRIDES, ACID CHLORIDES, SULFONYL CHLORIDES, ISOCYANATES AND CHLOROCARBONATES.
Claim 2
Dependent Claim
119 words
A LIGHT-SENSITIVE PHOTOGRAPHIC EMULSION COMPRISING A HYDROPHILIC COLLOID CARRIER HAVING DISPERSED THERETHROUGH IMMOBILE PACKETS OF AN OILY, NON-WATER MISCIBLE SOLVENT SURROUNDING LIGHT-SENSITIVE SILVER HALIDE GRAINS WHICH HAVE BEEN RENDERED HYDROPHOBIC BY TREATING A LIGHT-SENSITIVE GELATIN SILVER HALIDE PHOTOGRAPHIC EMULSION WITH A PROTEOLYTIC ENZYME IN ORDER TO DIGEST THE GELATIN CARRIER AND PRODUCE SILVER HALIDE GRAINS EACH SURROUNDED BY A HULL OF ADSORBED GELATIN, SEPARATING THE LIGHT-SENSITIVE GRAINS AND THEIR ABSORBED GELATIN HULLS FROM THE DIGESTED GELATIN AND TREATING BY INTIMATELY ASSOCIATING THE GELATIN HULLS AND SAID GRAINS WITH AN ALIPHATIC COMPOUND HAVING AS HYDROCARBON CHAIN OF AT LEAST 10 CARBON ATOMS AND A SUBSTITUENT SELECTED FROM THE GROUP CONSISTING OF ACID ANHYDRIDES, ACID CHLORIDES, SULFONYL CHLORIDES, ISOCYANATES AND CHLOROCARBONATES.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |