Patent US2937980A successfully refreshed from Google Patents.
US2937980A
Expired / Lapsed
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Method of making self-baking continuous electrodes
Assignee: Elektrokemisk AS
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Filing: 1957-01-23
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Granted: 1960-05-24
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Expires: 1977-01-23
Abstract
No abstract record available.
Inventors
- 👤 Schmitt Hans
- 👤 Toma Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:45
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125; H; H05; H05B; H05B7/00; H05B7/02; H05B7/06; H05B7/08; H05B7/085; H05B7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
THE METHOD OF OPERATING CELLS FOR THE ELECTROLYTIC PRODUCTION OF ALUMINUM IN FUSED CHLORIDES CONTAINING BATH USING SELF-BAKING CONTINUOUS CONSUMABLE ANODES FROM CARBONACEOUS MATERIAL WITH METALLIC STUDS FOR THE SUPPLY OF CURRENT, WHICH METHOD COMPRISES REPEATEDLY COVERING THE TOP OF THE CARBONACEOUS SELF-BAKING ANODE WITH A LAYER OF CARBONACEOUS PASTE OF SUBSTANTIALLY THE SAME COMPOSITION AS THE CARBONACEOUS MATERIAL OF THE ANODE AND LAYING UNBAKED PREFORMED BLOCKS OF CARBONACEOUS MATERIAL AND OF PREDETERMINED SIZE AND SHAPE THEREON WITHOUT INTERRUPTING THE OPERATION OF THE CELL, THE BOTTOM OF THE ANODE BEING ALREADY BAKED AND HAVING SUBSTANTIALLY THE ELECTROLYSIS TEMPERATURE AND THE TOP OF THE ANODE BEING UNBAKED, AND BONDING THE UNBAKED PREFORMED BLOCKS SIDE BY SIDE BY MEANS OF CARBONACEOUS PASTE OF SUBSTANTIALLY THE SAME COMPOSITION AS THE CARBONACEOUS MATERIAL OF THE ANODE, THE UNBAKED PREFORMED BLOCKS BEING ADDED TO THE TOP OF THE ANODE AT A RATE TO COMPENSATE FOR THE PROGRESSIVE CONSUMPTION OF THE BOTTOM OF THE ANODE.
Claim 2
Independent Claim
159 words
THE METHOD OF OPERATING CELLS FOR THE ELECTROLYTIC PRODUCTION OF ALUMINUM IN FUSED CHLORIDES CONTAINING BATH USING SELF-BAKING CONTINUOUS CONSUMABLE ANODES FROM CARBONACEOUS MATERIAL WITH METALLIC STUDS FOR THE SUPPLY OF CURRENT, WHICH METHOD COMPRISES REPEATEDLY COVERING THE TOP OF THE CARBONACEOUS SELF-BAKING ANODE WITH A LAYER OF CARBONACEOUS PASTE OF SUBSTANTIALLY THE SAME COMPOSITION AS THE CARBONACEOUS MATERIAL OF THE ANODE AND LAYING UNBAKED PREFORMED BLOCKS OF CARBONACEOUS MATERIAL AND OF PREDETERMINED SIZE AND SHAPE THEREON WITHOUT INTERRUPTING THE OPERATION OF THE CELL, THE BOTTOM OF THE ANODE BEING ALREADY BAKED AND HAVING SUBSTANTIALLY THE ELECTROLYSIS TEMPERATURE AND THE TOP OF THE ANODE BEING UNBAKED, AND BONDING THE UNBAKED PREFORMED BLOCKS SIDE BY SIDE BY MEANS OF CARBONACEOUS PASTE OF SUBSTANTIALLY THE SAME COMPOSITION AS THE CARBONACEOUS MATERIAL OF THE ANODE, THE UNBAKED PREFORMED BLOCKS BEING ADDED TO THE TOP OF THE ANODE AT A RATE TO COMPENSATE FOR THE PROGRESSIVE CONSUMPTION OF THE BOTTOM OF THE ANODE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |