Patent US3580835A successfully refreshed from Google Patents.
US3580835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic reduction cell
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1969-02-24
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Granted: 1971-05-25
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Expires: 1989-02-24
Abstract
Abstract IMPROVED ELECTROLYTIC REDUCTION CELL FOR PRODUCING MOLTEN MAGNESIUM METAL AND THE LIKE AND MADE UP OF UNIQUELY AND REMOVABLY ARRANGED OUTER AND INNER SHELLS HAVING A MASS OF THERMALLY RESISTANT MATERIAL INTERPOSED THEREBETWEEN AND WHEREIN THE INTERIOR OF THE CELL IS DI- VIDED IN AN IMPROVED FASHION INTO FEED AND ELECTROLYTIC CHAMBERS.
Inventors
- 👤 John R Peterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:53
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/04
Claims Analysis
Total Claims: 0
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |