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US2865748A
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3-acylamido-5-pyrazolone and 3-acylamido-5-acyloxypyrazole couplers for color photography
Assignee: Eastman Kodak Co
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Filing: 1956-10-30
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Granted: 1958-12-23
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Expires: 1976-10-30
Abstract
No abstract record available.
Inventors
- 👤 Feniak George
- 👤 Warren A Reckhow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:23
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
19 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF THOSE HAVING THE GENERAL FORMULAS
Claim 2
Dependent Claim
19 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF THOSE HAVING THE GENERAL FORMULAS
References Cited (Backward Citations)
US2721798A
Cited
US2772161A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-22 | 1962-06-23 | 1962-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-22 | 1966-06-23 | 1966-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-22 | 1970-06-23 | 1970-12-23 | $7700.00 | Window Closed / Lapsed |