US2895826A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color couplers containing fluoroalkylcarbonamido groups
Assignee: Eastman Kodak Co
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Filing: 1956-10-08
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Granted: 1959-07-21
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Ilmari F Salminen
- 👤 Charles R Barr
- 👤 Loria Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/3212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF PHENOLIC HYDROXYL, 5-PYRAZOLONE AND OPEN CHAIN REACTIVE METHYLENE COMPOUNDS CAPABLE OF FORMING A DYE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT, SAID COUPLER HAVING A PERFLUOROALKYLCARBONAMIDO GROUP ATTACHED TO ITS MOLECULE IN A NONCOUPLING POSITION.
Claim 2
Dependent Claim
55 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION CONTAINING A COUPLER COMPOUND OF THE CLASS CONSISTING OF PHENOLIC HYDROXYL, 5-PYRAZOLONE AND OPEN CHAIN REACTIVE METHYLENE COMPOUNDS CAPABLE OF FORMING A DYE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT, SAID COUPLER HAVING A PERFLUOROALKYLCARBONAMIDO GROUP ATTACHED TO ITS MOLECULE IN A NONCOUPLING POSITION.
References Cited (Backward Citations)
US2369489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |