US3796574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic compositions and processes for the formation of integral color masks
Assignee: Eastman Kodak Co
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Filing: 1972-05-03
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Granted: 1974-03-12
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Expires: 1992-05-03
Abstract
Abstract COMPOSITIONS AND PROCESSES ARE DISCLOSED FOR THE PREPARATION OF PHOTOGRAPHIC INTEGRAL COLORED MASKS IN NEGATIVE COLOR ELEMENTS BY TREATING THE ELEMENT AND OVERALL REESPOSURE, CONVENTIONAL COLOR DEVELOPMENT AND OVERALL REEXPOSURE WITH A SECOND COLOR DEVELOPING SOLUTION WHICH CONTAINS A P-SULFONAMIDOANILINE COLOR DEVELOPING AGENT. TREATMENT WITH THE SECOND COLOR DEVELOPING SOLUTION RESLTS IN A POSITIVE MASK THAT CORRECTS UNWANTED ABSORPTIONS OF THE DYE IMAGE FORMED BY THE CONVENTIONAL COLOR DEVELOPMENT STEP.
Inventors
- 👤 J Figueras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/18
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |