Patent US2743181A successfully refreshed from Google Patents.
US2743181A
Expired / Lapsed
US
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Stabilized photographic silver halide emulsions
Assignee: Eastman Kodak Co
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Filing: 1954-04-29
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Granted: 1956-04-24
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Charles F H Allen
- 👤 George A Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A COMPOUND REPRESENTED BY THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
21 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A COMPOUND REPRESENTED BY THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2449225A
Cited
US2450397A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-24 | 1959-10-24 | 1960-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-24 | 1963-10-24 | 1964-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-24 | 1967-10-24 | 1968-04-24 | $7700.00 | Window Closed / Lapsed |