Patent US3420670A successfully refreshed from Google Patents.
US3420670A
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Stabilization of synergistically sensitized photographic systems
Assignee: Eastman Kodak Co
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Filing: 1965-11-26
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Granted: 1969-01-07
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Expires: 1985-11-26
Abstract
No abstract record available.
Inventors
- 👤 Kirby M Milton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:27
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/34; G03C2001/091; G03C2001/097; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/3028; G03C5/3035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
IN A PHOTOGRAPHIC SILVER HALIDE EMULSION WHEREIN SAID HALIDE COMPRISES AT LEAST 50 MOLE PERCENT CHLORIDE SENSITIZED WITH A NOBLE METAL AND LABILE SELENIUM, THE IMPROVEMENT WHEREIN A 3-PYRAZOLIDONE IS USED AS A STABILIZER DURING THE SENSITIZATION OF SAID EMULSION.
Claim 2
Dependent Claim
40 words
IN A PHOTOGRAPHIC SILVER HALIDE EMULSION WHEREIN SAID HALIDE COMPRISES AT LEAST 50 MOLE PERCENT CHLORIDE SENSITIZED WITH A NOBLE METAL AND LABILE SELENIUM, THE IMPROVEMENT WHEREIN A 3-PYRAZOLIDONE IS USED AS A STABILIZER DURING THE SENSITIZATION OF SAID EMULSION.
References Cited (Backward Citations)
US3078163A
Cited
US3297447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |