US3386831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing of photographic silver halide emulsions with acyl phenyl hydrazides
Assignee: Agfa Gevaert NV
•
Filing: 1965-02-24
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Granted: 1968-06-04
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Honig Hans Ludwig
- 👤 Kolb Gunter
- 👤 Moll Franz
- 👤 Morcher Bernhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:32
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
AN AFTER-RIPENED PHOTOGRAPHIC SILVER HALIDE EMULSION THE SILVER HALIDE GRAINS OF WHICH ARE ESSENTIALLY SURFACE-SENSITIVE AND WHICH CONTAINS A STABILIZING AMOUNT OF A B-MONO-PHENYLLHYDRAZDE OF AN ALIPHATIC CARBOXYLIC ACID.
Claim 2
Dependent Claim
29 words
AN AFTER-RIPENED PHOTOGRAPHIC SILVER HALIDE EMULSION THE SILVER HALIDE GRAINS OF WHICH ARE ESSENTIALLY SURFACE-SENSITIVE AND WHICH CONTAINS A STABILIZING AMOUNT OF A B-MONO-PHENYLLHYDRAZDE OF AN ALIPHATIC CARBOXYLIC ACID.
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |