US3725077A
Expired / Lapsed
US
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Silver halide emulsions stabilized with nitroso derivatives of phenols
Assignee: Agfa Gevaert AG
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Filing: 1971-04-28
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Granted: 1973-04-03
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Expires: 1991-04-28
Abstract
Abstract THE STABILIZATION OF A PHOTOGRAPHIC SILVER HALIDE EMULSION WITH A COMPOUND OF THE GENERAL FORMULA 1-(X=),4-(Y=),R''-CYCLOHEXA-2,5-DIENE WHEREIN X=O, N-OR, Y=N-OR, R=H, ALKYL GROUP WITH 1-4 CARBON ATOMS, ACYL, R''=H, HALOGEN, ALKYL GROUP WITH 1-4 CARBON ATOMS.
Inventors
- 👤 K Kuffner
- 👤 E Proeschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |