US3652286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic silver halide multi-layer material containing cyan-forming couplers
Assignee: Agfa Gevaert AG
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Filing: 1970-03-26
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Granted: 1972-03-28
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Expires: 1990-03-26
Abstract
Abstract WHEREIN R1 is H, or a short chain alkyl; R2 is H, Cl, or a straight or branched chain alkyl; R3 is a straight or branched chain alkyl and WHEREIN THE CHAIN CARBON ATOMS OF R2 and R3 total to at least eight carbon atoms; N IS 0,1 OR 2. Color photographic material having a color coupler of the general formula
Inventors
- 👤 Hans-Heinrich Credner
- 👤 Hans Glockner
- 👤 Fritz Nittel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:04
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/34; G03C7/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2698794A
Cited
US2908573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |