US3779764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions for the production of reversal colorphotographic images
Assignee: Agfa Gevaert AG
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Filing: 1971-11-10
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Granted: 1973-12-18
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Expires: 1991-11-10
Abstract
Abstract A silver halide emulsion mixture for the preparation of colorphotographic reversal images by the imagewise exposure and color development of red- green- and blue sensitive emulsion layers in at least one of which the emulsion is a mixture of a relatively highly sensitive silver halide and a relatively less sensitive silver halide emulsion wherein the less sensitive silver halide emulsion has an average grain size at least 50 percent of the average grain size of the more highly sensitive emulsion.
Inventors
- 👤 F Moll
- 👤 B Morcher
- 👤 E Reckziegel
- 👤 W Saleck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C1/00; G03C1/005; G03C1/46
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
The process of claim 1, wherein the average grain size of the less sensitive silver halide emulsion is 50 to 70 percent of that of the more highly sensitive silver halide emulsion.
References Cited (Backward Citations)
US3600180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |