US2763552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modifiers for photographic packet emulsions
Assignee: Eastman Kodak Co
•
Filing: 1954-12-20
•
Granted: 1956-09-18
•
Expires: 1974-12-20
Abstract
No abstract record available.
Inventors
- 👤 John H Van Campen
- 👤 Jr John W Gates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/053; G03C7/00; G03C7/30; G03C7/388; G03C7/3882
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A LIGHT-SENSITIVE PACKET PHOTOGRAPHIC EMULSION COMPRISING PACKETS OR DISCRETE PARTICLES OF GELATIN REACTED WITH A WATER-SOLUBLE SALT OF AN INTERPOLYMER OF A STYRENE AND AN A,B-UNSATURATED CARBOXYLIC ACID, SAID PARTICLES OR PACKETS CONTAINING A NON-DIFFUSING COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT AND SILVER HALIDE, THE SENSITIVE AND COLOR-FORMING INGREDIENTS BEING WITHIN THE PACKETS OR DISCRETE PARTICLES AND SAID PACKETS OR DISCRETE PARTICLES BEING DISPERSED IN GELATIN HAVING MIXED THEREWITH A GELATIN DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF DEAMINATED GELATIN, AROMATIC SULFONYL CHLORIDE DERIVATIVES OF GELATIN, CARBOXYLIC ACID CHLORIDE DERIVATIVES OF GELATIN, CARBOXYLIC ACID ANHYDRIDE DERIVATIVES OF GELATIN, AROMATIC ISOCYANATE DERIVATIVES OF GELATIN, 1,4-DIKETONE DERIVATIVES OF GELATIN, ETHYLATED GELATIN, CYANOETHYLATED GELATIN, CYANOETHYLATED PHTHALYL GELATIN AND CYANOETHYLATED DEAMINATED GELATIN.
Claim 2
Dependent Claim
131 words
A LIGHT-SENSITIVE PACKET PHOTOGRAPHIC EMULSION COMPRISING PACKETS OR DISCRETE PARTICLES OF GELATIN REACTED WITH A WATER-SOLUBLE SALT OF AN INTERPOLYMER OF A STYRENE AND AN A,B-UNSATURATED CARBOXYLIC ACID, SAID PARTICLES OR PACKETS CONTAINING A NON-DIFFUSING COLOR-FORMING COMPOUND CAPABLE OF REACTING WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO DEVELOPING AGENT ON PHOTOGRAPHIC DEVELOPMENT AND SILVER HALIDE, THE SENSITIVE AND COLOR-FORMING INGREDIENTS BEING WITHIN THE PACKETS OR DISCRETE PARTICLES AND SAID PACKETS OR DISCRETE PARTICLES BEING DISPERSED IN GELATIN HAVING MIXED THEREWITH A GELATIN DERIVATIVE SELECTED FROM THE CLASS CONSISTING OF DEAMINATED GELATIN, AROMATIC SULFONYL CHLORIDE DERIVATIVES OF GELATIN, CARBOXYLIC ACID CHLORIDE DERIVATIVES OF GELATIN, CARBOXYLIC ACID ANHYDRIDE DERIVATIVES OF GELATIN, AROMATIC ISOCYANATE DERIVATIVES OF GELATIN, 1,4-DIKETONE DERIVATIVES OF GELATIN, ETHYLATED GELATIN, CYANOETHYLATED GELATIN, CYANOETHYLATED PHTHALYL GELATIN AND CYANOETHYLATED DEAMINATED GELATIN.
References Cited (Backward Citations)
US2284877A
Cited
US2698794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |