US3728121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer color photographic material
Assignee: Agfa Gevaert AG
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Filing: 1970-08-19
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Granted: 1973-04-17
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Expires: 1990-08-19
Abstract
Abstract TO IMPROVE THE COLOR REPRODUCTION OF A MULTI-LAYER COLOR REVERSAL MATERIAL, AT LEAST ONE CORRECTING LAYER OF A FINE-GRAINED SILVER HALIDE EMULSION HAVING A GRAIN DIAMETER BELOW 1U IS INCORPORATED IN THE MATERIAL. IT MAY BE DISPOSED OVER THE UPPERMOST, UNDER THE LOWERMOST OR BETWEEN THE ACTIVE EMULSION LAYERS. THE CORRECTING LAYER MAY BE SPECTRALLY SENSITIZED OR UNSENSITIZED, MAY BE RIPENED WITH GOLD AND MAY INCLUDE A SINGLE HALIDE OR A MIXTURE OF SEVERAL.
Inventors
- 👤 H Zorn
- 👤 F Muller
- 👤 H Broll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:57
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C2200/00; G03C2200/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |