Patent US3597199A successfully refreshed from Google Patents.
US3597199A
Expired / Lapsed
US
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Process for controlling the development of reversible color film
Assignee: Agfa Gevaert AG
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Filing: 1969-10-31
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Granted: 1971-08-03
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Expires: 1989-10-31
Abstract
Abstract PROCESS FOR CONTROLLING THE DEVELOPMENT OF MULTILAYER REVERSIBLE COLOR FILM WHICH HAS COMPONENTS INCORPORATED THEREIN CHARACTERIZED IN THAT THE FIRST DEVELOPER CONTAINS AMINOMERCAPTO DERIVATIVE HAVING 1 HETEROCYCLIC RING HAVING THE FOLLOWING FORMULA: S=C<(-N(-R)-C(=NH)-Y-NH-) WHEREIN R IS A HYDROGEN OR ARYL AND Y IS AN ATOM OR ATOM GROUPING NECESSARY TO COMPLETE A 5 OR 6 MEMBERED RING, OR ITS CORRESPONDING TAUTOMER.
Inventors
- 👤 Hans Glockner
- 👤 Karl Kuffner
- 👤 Herbert Stark
- 👤 Hans Gotthard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:21
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/407; G03C7/413
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |