US3320068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions with increased sensitivity
Assignee: Agfa Gevaert NV
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Filing: 1964-03-31
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Granted: 1967-05-16
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Expires: 1984-03-31
Abstract
No abstract record available.
Inventors
- 👤 Muller-Bardorff Wolfgang
- 👤 Saleck Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:03
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/09; G03C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
IN A PROCESS FOR PRODUCING A SENSITIZED PHOTOGRAPHIC SILVER HALIDE EMULSION, THE STEP WHICH COMPRISES AFTERRIPENING THE EMULSION ON THE ACID SIDE OF NEUTRALITY IN THE EFFECTIVE PRESENCE OF AT LEAST ONE WATER-SOLUBLE SALT OF A GROUP VIII METAL HAVING AN ATOMIC WEIGHT OF GREATER THAN 100 OR GOLD AND IN THE EFFECTIVE PRESENCE OF AN O-HYDROXYBENZYLAMINE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR PRODUCING A SENSITIZED PHOTOGRAPHIC SILVER HALIDE EMULSION, THE STEP WHICH COMPRISES AFTERRIPENING THE EMULSION ON THE ACID SIDE OF NEUTRALITY IN THE EFFECTIVE PRESENCE OF AT LEAST ONE WATER-SOLUBLE SALT OF A GROUP VIII METAL HAVING AN ATOMIC WEIGHT OF GREATER THAN 100 OR GOLD AND IN THE EFFECTIVE PRESENCE OF AN O-HYDROXYBENZYLAMINE COMPOUND OF THE 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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |