US2728660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Salicylic acid ester and amide photographic coupler compounds
Assignee: Eastman Kodak Co
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Filing: 1953-10-12
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Granted: 1955-12-27
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Expires: 1973-10-12
Abstract
No abstract record available.
Inventors
- 👤 Ilmari F Salminen
- 👤 Weissberger Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/346
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE METHOD OF PRODUCING A COLORED PHOTOGRAPHIC IMAGE IN AN EXPOSED SILVER HALIDE EMULSION LAYER WHICH COMPRISES DEVELOPING THE EXPOSED EMULSION LAYER WITH A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT IN THE PRESENCE OF A COUPLER COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULAS:
Claim 2
Independent Claim
50 words
THE METHOD OF PRODUCING A COLORED PHOTOGRAPHIC IMAGE IN AN EXPOSED SILVER HALIDE EMULSION LAYER WHICH COMPRISES DEVELOPING THE EXPOSED EMULSION LAYER WITH A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT IN THE PRESENCE OF A COUPLER COMPOUND SELECTED FROM THE CLASS CONSISTING OF COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULAS:
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |