US3582322A
Expired / Lapsed
US
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Color photographic elements and process
Assignee: Eastman Kodak Co
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Filing: 1968-06-11
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Granted: 1971-06-01
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Expires: 1988-06-11
Abstract
Abstract COLOR PHOTOGRAPHIC ELEMENTS CONTAINING DIFFERENTLY SENSITIZED SILVER HALIDE EMULSIONS, A NONDIFFUSIBLE YELLOW DYEFORMING COUPLER THAT REACTS WITH AN OXIDIZED PRIMARY AROMATIC AMINE COLOR DEVELOPING AGENT TO FORM A YELLOW DYE AND SUBSTANTIALLY NO UNCOLORED FORM OF THE YELLOW DYE, A 5-PYRAZOLONE COUPLER, A CYAN DYE-FORMING COUPLER AND HYDROPHILIC COLLOIDS THAT ARE SUBSTANTIALLY FREE OF ALDEHYDE HARDENING AGENTS AND SUBSTANTIALLY FREE OF ALDEHYDE-RELEASING HARDENING AGENTS ARE ADVANTAGEOUSLY COLOR PROCESSED BY COLOR DEVELOPMENT STEP FOLLOWED BY A BLIX STEP TO PRODUCE GOOD DYE IMAGE DENSITIES WITH SUBSTANTIALLY NO UNCOLORED FORMS OF THE DYES BEING PRESENT.
Inventors
- 👤 Charles O Edens
- 👤 John H Van Campen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C7/00; G03C7/30; G03C7/32; G03C7/3225; G03C7/42
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |