Patent US2772162A successfully refreshed from Google Patents.
US2772162A
Expired / Lapsed
US
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Diacylaminophenol couplers
Assignee: Eastman Kodak Co
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Filing: 1954-11-03
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Granted: 1956-11-27
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 Ilmari F Salminen
- 👤 Charles R Barr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:35
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF PRODUCING A CYAN PHOTOGRAPHIC IMAGE IN SILVER HALIDE EMULSION LAYER, WHICH COMPRISES EXPOSING THE LAYER AND DEVELOPING IT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A 2,5-DIACYLAMINOPHENOL COUPLER COMPOUND, IN WHICH THE ACYL IS DERIVED FROM CARBOXYLIC ACID.
Claim 2
Independent Claim
45 words
THE METHOD OF PRODUCING A CYAN PHOTOGRAPHIC IMAGE IN SILVER HALIDE EMULSION LAYER, WHICH COMPRISES EXPOSING THE LAYER AND DEVELOPING IT WITH A PRIMARY AROMATIC AMINO DEVELOPING AGENT IN THE PRESENCE OF A 2,5-DIACYLAMINOPHENOL COUPLER COMPOUND, IN WHICH THE ACYL IS DERIVED FROM CARBOXYLIC ACID.
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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |