US2689793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlling grain and contrast in color photography
Assignee: Eastman Kodak Co
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Filing: 1953-03-13
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Granted: 1954-09-21
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Expires: 1973-03-13
Abstract
No abstract record available.
Inventors
- 👤 William R Weller
- 👤 Nicholas H Groet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:19
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR PREPARING COLORED PHOTOGRAPHIC IMAGES WHICH COMPRISES EXPOSING TO A SUBJECT A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COUPLER COMPOUND, DEVELOPING THE EXPOSED EMULSION LAYER WITH A COLORDEVELOPING SOLUTION CONTAINING A MIXTURE OF A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT AND A DIFFUSIBLE COUPLER COMPOUND, TO OBTAIN IN THE EXPOSED REGION OF THE EMULSION LAYER BOTH A NON-DIFFUSIBLE DYE IMAGE FROM THE NONDIFFUSIBLE COUPLER AND A DIFFUSIBLE DYE IMAGE FROM THE DIFFUSIBLE COUPLER, AND WASHING THE DIFFUSIBLE DYE IMAGE FROM THE EMULSION LAYER.
Claim 2
Dependent Claim
88 words
A PROCESS FOR PREPARING COLORED PHOTOGRAPHIC IMAGES WHICH COMPRISES EXPOSING TO A SUBJECT A LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COUPLER COMPOUND, DEVELOPING THE EXPOSED EMULSION LAYER WITH A COLORDEVELOPING SOLUTION CONTAINING A MIXTURE OF A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT AND A DIFFUSIBLE COUPLER COMPOUND, TO OBTAIN IN THE EXPOSED REGION OF THE EMULSION LAYER BOTH A NON-DIFFUSIBLE DYE IMAGE FROM THE NONDIFFUSIBLE COUPLER AND A DIFFUSIBLE DYE IMAGE FROM THE DIFFUSIBLE COUPLER, AND WASHING THE DIFFUSIBLE DYE IMAGE FROM THE EMULSION LAYER.
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) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |