US2852370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic color reproduction process using colored couplers
Assignee: Eastman Kodak Co
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Filing: 1957-07-08
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Granted: 1958-09-16
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Expires: 1977-07-08
Abstract
No abstract record available.
Inventors
- 👤 Keith E Whitmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:18
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PREPARING A MASKING IMAGE IN A MULTILAYER PHOTOGRAPHIC COLOR FILM CONTAINING SILVER HALIDE EMULSION LAYERS SENSITIZED TO LIGHT OF DIFFERENT REGIONS OF THE SPECTRUM, ONE OF WHICH LAYERS CONTAINS A COLORLESS COUPLER WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINE DEVELOPING AGENT TO FORM A NONDIFFUSIBLE DYE IMAGE IN SAID LAYER AND FURTHER CONTAINS A COLORED COLOR-FORMING COUPLER OF THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING GENERAL FORMULAS:
Claim 2
Independent Claim
76 words
THE METHOD OF PREPARING A MASKING IMAGE IN A MULTILAYER PHOTOGRAPHIC COLOR FILM CONTAINING SILVER HALIDE EMULSION LAYERS SENSITIZED TO LIGHT OF DIFFERENT REGIONS OF THE SPECTRUM, ONE OF WHICH LAYERS CONTAINS A COLORLESS COUPLER WHICH IS REACTIVE WITH THE OXIDATION PRODUCT OF A PRIMARY AROMATIC AMINE DEVELOPING AGENT TO FORM A NONDIFFUSIBLE DYE IMAGE IN SAID LAYER AND FURTHER CONTAINS A COLORED COLOR-FORMING COUPLER OF THE CLASS CONSISTING OF THOSE HAVING THE FOLLOWING GENERAL FORMULAS:
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) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |