US2940854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gelatin silver halide emulsion plasticized with dicarboxylic acid esters
Assignee: Eastman Kodak Co
•
Filing: 1956-08-16
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Granted: 1960-06-14
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Expires: 1976-08-16
Abstract
No abstract record available.
Inventors
- 👤 Glen G Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/043; G03C1/76; G03C1/775; Y; Y10; Y10S; Y10S260/00; Y10S260/15; Y10S260/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A GELATINO-SILVER HALIDE EMULSION CONTAINING 10-150% BY WEIGHT BASED ON THE GELATIN CONTENT OF A COMPOSITION OF MATTER OBTAINED BY REFLUXING ABOUT 1 MOL OF A DIBASIC ACID SELECTED FROM THE GROUP CONSISTING OF SUCCINIC, ADIPIC, AND PHTHALIC ACIDS WITH ABOUT 3 MOLS OF A MIXTURE OF 30-25% BY WEIGHT ETHYLENE GLYCOL AND 70-75% BY WEIGHT DIETHYLENE GLYCOL MONOALKYL ETHER HAVING THE FOLLOWING FORMULA:
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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) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |