US3476564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsion containing an azo-pyrazolone coupler
Assignee: Ferrania SpA
•
Filing: 1966-05-03
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Granted: 1969-11-04
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Expires: 1986-05-03
Abstract
No abstract record available.
Inventors
- 👤 Brunello Mariani
- 👤 Alberto Guizzi
- 👤 Eugenio Tisselli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2455170A
Cited
US3227551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |