US3326690A
Expired / Lapsed
US
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Silver halide emulsions with increased sensitivity
Assignee: Agfa Gevaert NV
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Filing: 1964-04-13
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Granted: 1967-06-20
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Expires: 1984-04-13
Abstract
No abstract record available.
Inventors
- 👤 Muller-Bardorff Wolfgang
- 👤 Saleck Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G21; G21D; G21D5/00; G21D5/04; G21D5/08; Y; Y02; Y02E; Y02E30/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
METHOD OF INCREASING THE SENSITIVITY OF SILVER HALIDE EMULSIONS, CHARACTERIZED IN THAT THE AFTER-RIPENING IS PERFORMED WITH NOBLE METAL SALTS AND WATER-SOLUBLE ALIPHATIC HYDROXYCARBOXYLIC ACIDS HAVING UP TO 10 CARBON ATOMS OF THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
35 words
METHOD OF INCREASING THE SENSITIVITY OF SILVER HALIDE EMULSIONS, CHARACTERIZED IN THAT THE AFTER-RIPENING IS PERFORMED WITH NOBLE METAL SALTS AND WATER-SOLUBLE ALIPHATIC HYDROXYCARBOXYLIC ACIDS HAVING UP TO 10 CARBON ATOMS OF THE FOLLOWING FORMULA:
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) | 1970-06-19 | 1970-12-19 | 1971-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-19 | 1974-12-19 | 1975-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-19 | 1978-12-19 | 1979-06-20 | $7700.00 | Window Closed / Lapsed |