US2959533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aluminium by fused salt electrolysis with vertical or inclined cathodes of carbon and aluminium
Assignee: Montedison SpA
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Filing: 1956-07-25
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Granted: 1960-11-08
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Expires: 1976-07-25
Abstract
No abstract record available.
Inventors
- 👤 Varda Giuseppe De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:18
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FURNACE FOR PRODUCING ALUMINUM BY ELECTROLYSIS OF ALUMINA IN A FUSED SALT BATH, THE ELECTRODES OF WHICH COMPRISE AN ANODE ELEMENT, A BIPOLAR ELECTRODE PROVIDING ON ITS OPPOSITE SIDES CATHODIC AND ANODIC SURFACES, AND A CATHODE ELEMENT, THE CATHODE WALLS OF THE ELECTRODES BEING INCLINED AND FACING UPWARDLY, RESPECTIVE PAIRS OF OPPOSED CATHODIC AND ANODIC SURFACES DEFINING ELECTROLYSIS GAPS THEREBETWEEN, A LOWER CHAMBER ADAPTED TO RECEIVE THE ALUMINUM PRODUCED, THE ANODIC SURFACES OF THE ELECTRODES BEING DISPOSED AT AN ANGLE TO THE HORIZONTAL AND FACING DOWNWARDLY AT THEIR RESPECTIVE ELECTROLYSIS GAPS AND BEING FORMED OF CARBONACEOUS MATERIAL CONSUMED IN THE ELECTROLYSIS OF THE ALUMINA, THE CATHODE WALLS OF THE ELECTRODES HAVING CAVITIES DISTRIBUTED OVER
Claim 2
Dependent Claim
115 words
A FURNACE FOR PRODUCING ALUMINUM BY ELECTROLYSIS OF ALUMINA IN A FUSED SALT BATH, THE ELECTRODES OF WHICH COMPRISE AN ANODE ELEMENT, A BIPOLAR ELECTRODE PROVIDING ON ITS OPPOSITE SIDES CATHODIC AND ANODIC SURFACES, AND A CATHODE ELEMENT, THE CATHODE WALLS OF THE ELECTRODES BEING INCLINED AND FACING UPWARDLY, RESPECTIVE PAIRS OF OPPOSED CATHODIC AND ANODIC SURFACES DEFINING ELECTROLYSIS GAPS THEREBETWEEN, A LOWER CHAMBER ADAPTED TO RECEIVE THE ALUMINUM PRODUCED, THE ANODIC SURFACES OF THE ELECTRODES BEING DISPOSED AT AN ANGLE TO THE HORIZONTAL AND FACING DOWNWARDLY AT THEIR RESPECTIVE ELECTROLYSIS GAPS AND BEING FORMED OF CARBONACEOUS MATERIAL CONSUMED IN THE ELECTROLYSIS OF THE ALUMINA, THE CATHODE WALLS OF THE ELECTRODES HAVING CAVITIES DISTRIBUTED OVER
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |