US2991235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for supplying current to the anode of aluminum refining cells
Assignee: Pechiney SA
•
Filing: 1957-07-02
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Granted: 1961-07-04
•
Expires: 1977-07-02
Abstract
No abstract record available.
Inventors
- 👤 Ravier Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:52
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/24; C25C3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN THE ELECTROLYTIC REFINING OF METALS BY THE THREELAYER METHOD IN A CELL CONTAINING IN SUPERPOSED RELATION AND IN THE ORDER NAMED, (A) A MOLTEN LAYER OF AN ALLOY OF THE IMPURE METAL TO BE REFINED AND A HEAVY METAL, SAID LAYER RESTING ON THE BOTTOM OF THE CELL AND SERVING AS THE ANODE, (B) A LAYER OF A MOLTEN ELECTROLYTE, AND (C) A LAYER OF THE REFINED METAL SERVING AS A CATHODE, THE IMPROVEMENT OF ADVANTAGEOUSLY REDUCING IN THE OPERATION OF SAID METHOD THE ANODIC VOLTAGE DROP IN THE CELL, WHICH CONSISTS IN: SUPPLYING THE CURRENT TO THE MOLTEN ANODE IN THE CELL BY A METALLIC BAR CONSTITUTED OF A FERROUS MATERIAL IN DIRECT CONTACT WITH SAID MOLTEN ANODE AND REGULATING THE STRENGTH OF THE CURRENT IN THE BAR TO A CURRENT DENSITY OF 30 TO 40 AMPERES PER SQUARE CENTIMETER.
Claim 2
Dependent Claim
142 words
IN THE ELECTROLYTIC REFINING OF METALS BY THE THREELAYER METHOD IN A CELL CONTAINING IN SUPERPOSED RELATION AND IN THE ORDER NAMED, (A) A MOLTEN LAYER OF AN ALLOY OF THE IMPURE METAL TO BE REFINED AND A HEAVY METAL, SAID LAYER RESTING ON THE BOTTOM OF THE CELL AND SERVING AS THE ANODE, (B) A LAYER OF A MOLTEN ELECTROLYTE, AND (C) A LAYER OF THE REFINED METAL SERVING AS A CATHODE, THE IMPROVEMENT OF ADVANTAGEOUSLY REDUCING IN THE OPERATION OF SAID METHOD THE ANODIC VOLTAGE DROP IN THE CELL, WHICH CONSISTS IN: SUPPLYING THE CURRENT TO THE MOLTEN ANODE IN THE CELL BY A METALLIC BAR CONSTITUTED OF A FERROUS MATERIAL IN DIRECT CONTACT WITH SAID MOLTEN ANODE AND REGULATING THE STRENGTH OF THE CURRENT IN THE BAR TO A CURRENT DENSITY OF 30 TO 40 AMPERES PER SQUARE CENTIMETER.
References Cited (Backward Citations)
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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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |