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Patent US2933391A successfully refreshed from Google Patents.
US2933391A
Expired / Lapsed
US
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Photographic emulsions containing 5-pyrazolone coupler compounds
Assignee: Eastman Kodak Co
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Filing: 1956-09-06
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Granted: 1960-04-19
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Expires: 1976-09-06
Abstract
No abstract record available.
Inventors
- 👤 Feniak George
- 👤 Loria Anthony
- 👤 Warren A Reckhow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:03
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/38; G03C7/384; C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/18; C07D231/20; C07D231/22; C07D231/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER CONTAINING A MEMBER OF THE CLASS CONSISTING OF A 1-(DICHLORPHENYL-)-3-ALKYL-5-PYRAZOLONE AND A 1-(TRICHLOROPHENYL)-3-ALKYL-5-PYRAZOLONE, THE ALKYL RADICAL OF WHICH CONTAINS FROM 11 TO 17 CARBON ATOMS.
Claim 2
Dependent Claim
32 words
A LIGHT-SENSITIVE PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER CONTAINING A MEMBER OF THE CLASS CONSISTING OF A 1-(DICHLORPHENYL-)-3-ALKYL-5-PYRAZOLONE AND A 1-(TRICHLOROPHENYL)-3-ALKYL-5-PYRAZOLONE, THE ALKYL RADICAL OF WHICH CONTAINS FROM 11 TO 17 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |