US2808329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color correction using colored and uncolored couplers
Assignee: Eastman Kodak Co
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Filing: 1954-11-22
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Granted: 1957-10-01
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Keith E Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:40
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF PRODUCING A MASKING IMAGE IN A MULTILAYER PHOTOGRAPHIC ELEMENT, SAID LAYERS BEING SILVER HALIDE EMULSION LAYERS, AND WHEREIN AT LEAST ONE OF SAID LAYERS CONTAINS AT LEAST ONE UNCOLORED COLOR-FORMING COUPLER WHICH IS REACTIVE WITH AN OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINE DEVELOPING AGENT TO FORM A NONDIFFUSIBLE DYE IN TH SAID LAYER AND FURTHER CONTAINS AT LEAST ONE COLORED COLOR-FORMING COUPLER SELECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 2
Independent Claim
79 words
THE METHOD OF PRODUCING A MASKING IMAGE IN A MULTILAYER PHOTOGRAPHIC ELEMENT, SAID LAYERS BEING SILVER HALIDE EMULSION LAYERS, AND WHEREIN AT LEAST ONE OF SAID LAYERS CONTAINS AT LEAST ONE UNCOLORED COLOR-FORMING COUPLER WHICH IS REACTIVE WITH AN OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINE DEVELOPING AGENT TO FORM A NONDIFFUSIBLE DYE IN TH SAID LAYER AND FURTHER CONTAINS AT LEAST ONE COLORED COLOR-FORMING COUPLER SELECTED FROM THE GROUP CONSISTING OF THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
References Cited (Backward Citations)
US2435616A
Cited
US2428054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |