US3723093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the continuous production of aluminum
Assignee: Resonac Holdings Corp
•
Filing: 1970-05-05
•
Granted: 1973-03-27
•
Expires: 1990-05-05
Abstract
Abstract A PROCESS FOR THE PRODUCTION OF ALUMINUM WHICH COMPRISES SUBJECTING A CHARGE OF ALUMINA AND CARBON TO THE ACTION OF AN ELECTRIC ARC IN A FURNACE TO FORM A MOLTEN MIXTURE COMPRISING ALUMINUM AND ALUMINUM CARBIDE, THEREAFTER REPEATING THE STEPS OF (A9 ALLOWING THE THUS FORMED MIXTURE OF COOL WITHIN THE FURNACE TO A TEMPERATURE WITHIN THE RANGE OF 1900-1400* C. (B) WITHDRAWING FREE ALUMINUM STILL IN THE MOLTEN STATE IN SAID MIXTURE OUT OF THE FURNACE AND RECOVERING THE SAME, AND (C) AGAIN SUBJECTING THE REMAINDER IN THE FURNACE TO THE ACTION OF THE ELECTRIC ARC, WHILE FEEDING A SUBSEQUENT CHARGE OF ALUMINA AND CARBON, TO FORM SAID MOLTEN MIXTURE.
Inventors
- 👤 T Shiba
- 👤 T Saito
- 👤 J Tsurugi
- 👤 M Takahashi
- 👤 K Goto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:29
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/02
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) | 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 |