Patent US2940849A successfully refreshed from Google Patents.
US2940849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planographic dye transfer process
Assignee: Eastman Kodak Co
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Filing: 1957-07-10
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Granted: 1960-06-14
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Expires: 1977-07-10
Abstract
No abstract record available.
Inventors
- 👤 Keith E Whitmore
- 👤 Williams John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:54
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/22; G03C7/25; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A PHOTOGRAPHIC REPRODUCTION PROCESS WHICH COMPRISES EXPOSING A PLURALITY OF GELATINO SILVER HALIDE EMULSION LAYERS ON SEPARATE SUPPORTS EACH TO DIFFERENT PRIMARY COLOR SEPARATION IMAGES OF A COLORED SUBJECT, DEVELOPING EACH OF THE EXPOSED EMULSION LAYERS WITH A SILVER HALIDE DEVELOPING SOLUTION CONTAINING A PRIMARY AROMATIC AMINO SILVER HALIDE DEVELOPING AGENT AND A COUPLER COMPOUND REACTIVE WITH THE OXIDATION PRODUCT OF SAID DEVELOPING AGENT TO FORM A DYE IMAGE OF A SUBSTANTIALLY NONDIFFUSING DYE OF THE CLASS CONSISTING OF ACID AND BASIC DYES IN EACH EMULSION LAYER, BLEACHING THE RESULTANT SILVER IMAGE AND FIXING, DYEING EACH OF THE RESULTING DYE IMAGES WITH A DIFFUSIBLE DYE WHICH FORMS A SALT WITH SAID DYE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |