Patent US3128187A successfully refreshed from Google Patents.
US3128187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoggants for photographic silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1961-02-08
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Granted: 1964-04-07
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Expires: 1981-02-08
Abstract
No abstract record available.
Inventors
- 👤 Jr John Sagal
- 👤 Frank D Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:51
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
A PHOTOGRAPHIC GELATINO-SILVER HALIDE EMULSION STABILIZED BY THE ADDITION THERETO OF A SATURATED ALIPHATIC CARBOXYLIC ACID CONTAINING FROM 2 TO 10 CARBON ATOMS AND HAVING A BROMINE ATOM SUBSTITUTED ON A CARBON ATOM ADJACENT TO THE CARBOXYL RADICAL.
Claim 2
Dependent Claim
38 words
A PHOTOGRAPHIC GELATINO-SILVER HALIDE EMULSION STABILIZED BY THE ADDITION THERETO OF A SATURATED ALIPHATIC CARBOXYLIC ACID CONTAINING FROM 2 TO 10 CARBON ATOMS AND HAVING A BROMINE ATOM SUBSTITUTED ON A CARBON ATOM ADJACENT TO THE CARBOXYL RADICAL.
References Cited (Backward Citations)
US2438716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |