Patent US2709864A successfully refreshed from Google Patents.
US2593741A
Expired / Lapsed
US
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Process for the electrolytic production of aluminum
Assignee: Individual
•
Filing: 1946-07-16
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Granted: 1952-04-22
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Expires: 1966-07-16
Abstract
No abstract record available.
Inventors
- 👤 Ferrand Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:26
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20; C25C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF PRODUCING ELECTROLYTIC ALUMINUM IN AN OVEN HAVING A CARBON ANODE SUSPENDED IN A LAYER OF MOLTEN ALUMINA ELECTROLYTE COMPRISING DISPERSING FINELY POWERDED ALUMINA IN A ATMOSPHERE OF GASEOUS METHANE, AND DISCHARGING THE RESULTING SUSPENSION DIRECTLY INTO THE SPACE BETWEEN THE ANODE AND THE MOLTEN LAYER, THE PROPORTION OF ALUMINA TO METHANE IN SAID SUSPENSION BEING SUCH THAT THE METHANE IS SUFFICIENT IN AMOUNT TO COMBINE THE ENTIRE OXYGEN CONTENT OF EACH PARTICLE OF ALUMINA THEREIN; WHEREBY TO OBVIATE OXIDATION OF THE CARBON ANODE.
Claim 2
Independent Claim
86 words
THE METHOD OF PRODUCING ELECTROLYTIC ALUMINUM IN AN OVEN HAVING A CARBON ANODE SUSPENDED IN A LAYER OF MOLTEN ALUMINA ELECTROLYTE COMPRISING DISPERSING FINELY POWERDED ALUMINA IN A ATMOSPHERE OF GASEOUS METHANE, AND DISCHARGING THE RESULTING SUSPENSION DIRECTLY INTO THE SPACE BETWEEN THE ANODE AND THE MOLTEN LAYER, THE PROPORTION OF ALUMINA TO METHANE IN SAID SUSPENSION BEING SUCH THAT THE METHANE IS SUFFICIENT IN AMOUNT TO COMBINE THE ENTIRE OXYGEN CONTENT OF EACH PARTICLE OF ALUMINA THEREIN; WHEREBY TO OBVIATE OXIDATION OF THE CARBON ANODE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-22 | 1955-10-22 | 1956-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-22 | 1959-10-22 | 1960-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-22 | 1963-10-22 | 1964-04-22 | $7700.00 | Window Closed / Lapsed |