Patent US3556789A successfully refreshed from Google Patents.
US3556789A
Expired / Lapsed
US
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Color oscillograph processing
Assignee: Eastman Kodak Co
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Filing: 1967-11-15
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Granted: 1971-01-19
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Expires: 1987-11-15
Abstract
Abstract AN IMPROVEMENT IN A PROCESS FOR DEVELOPING MULTICOLORED PHOTOGRAPHIC TRACE RECORDING MATERIAL, THE TRACE MATERIAL CONSISTING OF A LIGHT-COLORED SUPPORTING SHEET HAVING SUPERPOSED THEREON AT LEAST TWO LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYERS EACH ONE OF WHICH IS SENSITIVE TO LIGHT OF DIFFERENT WAVE LENGTHS AND EACH ONE OF WHICH CONTAINS A NON-DIFFUSING COLOR FORMER, WHICH COMPRISES PASSING THE MATERIAL, AFTER TRACE RECORDING EXPOSURE TO LIGHT OF DIFFERENT COLORS, PROGRESSIVELY AND IN SEQUENCE THROUGH AN AQUEOUS CAUSTIC ALKALI SOLUTION, AN AQUEOUS COLOR DEVELOPER SOLUTION AN AN AQUEOUS FIXER SOLUTION.
Inventors
- 👤 Carl E Johnson
- 👤 Dewey M Dumers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:53
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3046
Claims Analysis
Total Claims: 0
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |