Patent US2766854A successfully refreshed from Google Patents.
US2471965A
Expired / Lapsed
US
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Method of electrolytically producing zinc of high purity
Assignee: Hudbay Minerals Inc
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Filing: 1946-08-01
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Granted: 1949-05-31
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Expires: 1966-08-01
Abstract
No abstract record available.
Inventors
- 👤 Lowe Sherwin Pope
- 👤 Long George William
- 👤 Kent George Henry
- 👤 Downes Kenneth William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:36
CPC Classifications
C; C25; C25C; C25C1/00; C25C1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1607870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |