US3723286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum reduction cell
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1971-11-08
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Granted: 1973-03-27
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Expires: 1991-11-08
Abstract
Abstract THE DISTORTION OF THE CARBONACEOUS CATHODE LINING OF AN ALUMINUM REDUCTION CELL IS SUBSTANTIALLY REDUCED BY ANCORPORATING A LAYER OF SALT SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDE AND FLUORIDE SALTS OF SODIUM, LITHIUM, CALCIUM AND MAGANESIUM BETWEEN THE CARBONACEOUS LINING AND THE INSULATING LAYER OF REFRACTORY MATERIAL. D R A W I N G
Inventors
- 👤 L Hunt
- 👤 J Lago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:40
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/085
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |