Patent US3720516A successfully refreshed from Google Patents.
US3720516A
Expired / Lapsed
US
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Silver halide emulsions stabilized with manganous salts
Assignee: Eastman Kodak Co
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Filing: 1971-10-15
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Granted: 1973-03-13
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Expires: 1991-10-15
Abstract
Abstract PROCESS FOR PRECIPITATING SILVER HALIDE GRAINS IN THE PRESENCE OF A THODIUM SALT AND STABILIZING EMULSIONS COMPRISING SAID GRAINS WITH (1) A WATER SOLUBLE MANGANOUS SALT OR (2) A COMBINATION OF SAID WATER SOLUBLE MANGANOUS SALT AND CADMIUM BROMIDE ARE DISCLOSED. PHOTOGRAPHIC EMULSIONS AND ELEMENTS CONTAINING THESE SILVER HALIDE GRAINS ARE ECOLOGICALLY DESIRED AND ARE PARTICULARLY USEFUL IN PROVIDING UNEXPECTED AND IMPROVED SENSITOMERIC PROPERTIES, PARTICULARLY UPON STORAGE.
Inventors
- 👤 R Woodward
- 👤 N Sidebotham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:58
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |