Patent US3220847A successfully refreshed from Google Patents.
US3220847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic gelatin layers containing the water-soluble salts of various half esters of substituted succinic acid as coating aids
Assignee: Eastman Kodak Co
•
Filing: 1962-02-23
•
Granted: 1965-11-30
•
Expires: 1982-02-23
Abstract
No abstract record available.
Inventors
- 👤 Jr William J Knox
- 👤 Robert E Sticker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
13 words
A COMPOSITION COMPRISING GELATIN HAVING THEREIN A WATER-SOLUBLE COATING AID HAVING THE FORMULA:
Claim 2
Dependent Claim
13 words
A COMPOSITION COMPRISING GELATIN HAVING THEREIN A WATER-SOLUBLE COATING AID HAVING THE FORMULA:
Claim 3
Dependent Claim
22 words
A PHOTOGRAPHIC EMULSION COMPRISING SILVER HALIDE GRAINS CARRIED BY A GELATIN VEHICLE WHICH GELATIN CONTAINS A WATER-SOLUBLE COATING AID HAVING THE FORMULA:
Claim 4
Dependent Claim
22 words
A PHOTOGRAPHIC EMULSION COMPRISING SILVER HALIDE GRAINS CARRIED BY A GELATIN VEHICLE WHICH GELATIN CONTAINS A WATER-SOLUBLE COATING AID HAVING THE FORMULA:
References Cited (Backward Citations)
US2899327A
Cited
US2240476A
Cited
US2960404A
Cited
US3038804A
Cited
US2940854A
Cited
US3018178A
Cited
US2933406A
Cited
US2937088A
Cited
US3033680A
Cited
US3042524A
Cited
US3026202A
Cited
US3068101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |