US3826652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for developing radiation-sensitive elements
Assignee: Eastman Kodak Co
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Filing: 1972-12-04
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Granted: 1974-07-30
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Expires: 1992-12-04
Abstract
Abstract PHOTOGRAPHIC DYE IMAGES CAN BE PRODUCED BY PHYSICAL DEVELOPMENT OF IMAGEWISE EXPOSED ELEMENTS CONTAINING A RADIATION-SENSITIVE METAL COMPOUND TO FORM AN IMAGEWISE DISTRIBUTION OF CATALYST. THE RESULTANT CATALYST IMAGE IS THEN TREATED IN THE PRESENCE OF A COLOR DEVELOPER AND A COLOR COUPLER WITH AN AMPLIFIER SOLUTION CONTAINIG A COBALT (III) COMPLEX HAVING A COORDINATION NUMBER OF SIX, WHEREIN SAID TREATMENT IS ACCOMPLISHED UNDER CONDITIONS WHICH REDUCE COBALT (III) TO COBALT (II) AND, IN TURN, OXIDIZE THE COLOR DEVELOPER TO THEREBY FORM IMAGE DYE FROM THE OXIDIZED COLOR DEVELOPER AND THE COLOR COUPLER.
Inventors
- 👤 V Bissonette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:53
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/40; G03C5/42; G03C5/56; G03C7/00; G03C7/30; G03C7/3017; G03C7/3018; G03C8/00; G03C8/02; G03C8/08; Y; Y10; Y10S; Y10S430/00; Y10S430/137
Claims Analysis
Total Claims: 0
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |