US3592650A
Expired / Lapsed
US
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Light and heat sensitive system comprising a leuco base of a dialkylamino polyarylmethane dye quaternized to the maximum extent
Assignee: Eastman Kodak Co
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Filing: 1969-08-01
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Granted: 1971-07-13
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Expires: 1989-08-01
Abstract
Abstract THE LEUCO BASE OF A POLYARYLMETHANE DYE, SUCH AS CYRSTAL VIOLET OR MALACHITE GREEN, WHICH HAS BEEN QUATERNIZED TO THE MAXIMUM EXTENT WITH AN ALKYL IODIDE, SUCH AS METHYL IODIDE, IS A RADIATION-SENSITIVE MATERIAL WHICH IS USEFUL IN THE PREPARATION OF IMAGES BY THERMOGRAPHIC AND PHOTOTHERMOGRAPHIC PROCESSES. IMAGES IN A VARIETY OF COLORS CAN BE PREPARED FROM ELEMENTS CONTAINING THIS MATERIAL BY IMAGEWISE EXPOSURE TO HEAT OR BY IMAGEWISE EXPOSURE TO ULTRAVIOLET RADIATION OR HALOGEN VAPOR, PRECEDED OR FOLLOWED BY UNIFORM EXPOSURE TO HEAT.
Inventors
- 👤 Roy C De Selms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/72; G03C1/73; G03C1/732; B; B41; B41M; B41M5/00; B41M5/26; B41M5/30; B41M5/323; C; C09; C09B; C09B11/00; C09B11/04; C09B11/10; C09B11/22
Claims Analysis
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |