US3554893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic furnaces having multiple cells formed of horizontal bipolar carbon electrodes
Assignee: Montedison SpA
•
Filing: 1966-10-17
•
Granted: 1971-01-12
•
Expires: 1986-10-17
Abstract
Abstract DESCRIBED IS A FUSED BATH ELETROYLSIS FURNACE FOR PRODUCING METALS, OF HIGHER SPECIFIC GRAVITY THAN THE BATH, FROM THEIR OXIDES. THE FURNACE COMPRISES A VAT WITH A CATHODIC BOTTOM, A CARBON ANODE ADAPTED TO BE LIFTED AND LOWERED RELATIVE TO SAID BOTTOM, AND AT LEAST ONE HORIZONTAL BIPOLAR CARBON ELECTRODE BETWEEN SAID ANODE AND CATHODE IN VERTICALLY SPACED RELATION THERETO AND HAVING A CATHODIC TOP FACE FOR ACCUMULTING METAL PRODUCED. ALSO DESCRIBED IS THE PRODUCTION OF ALUMINUM FROM ALUMINA IN A BATH CONTAINING FLUORINE SALTS IN SUCH FURNACES.
Inventors
- 👤 Giuseppe De Varda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:18
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |