Patent US4701342A successfully refreshed from Google Patents.
US3090744A
Expired / Lapsed
US
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Electrolytic furnace for producing aluminum having a crust breaking apparatus
Assignee: Aluminium Industrie AG
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Filing: 1960-12-27
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Granted: 1963-05-21
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Expires: 1980-12-27
Abstract
No abstract record available.
Inventors
- 👤 Muller Paul
- 👤 Schmitt Johannes
- 👤 Wittner Hubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:10
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
IN AN ELECTROLYTIC FURNANCE FOR THE PRODUCTION OF ALUMINUM WITH THE USE OF A MOLTEN SALT BATH, THE COMBINATION COMPRISING A FRAME, ANODES FOR SAID FURNANCE, MEANS SUPPORTING SAID ANODES FROM SAID FRAME IN TWO ROWS SEPARATED BY A GAP THEREBETWEEN EXTENDING ALONG THE FULL LENGTH OF THE REGION OCCUPIED BY SAID ANODES AND DIRECTLY ABOVE THE AREA WHERE A CRUST IS FORMED ON THE ELECTROCLYTE, AN A CRUST BREAKER COMPRISING ONE OR MORE SUBSTANTIALLY HORIZONTAL BEAMS EXTENDING IN AND ALONG SUBSTANTIALLY THE FULL LENGTH OF SAID GAP AND PROVIDED WITH SUBSTANTIALLY VERTICALLY DOWNWARDLY DIRECTED TEETH DISTRIBUTED SUBSTANTIALLY ALONG THE FULL LENGTH OF SAID GAP, AND MEANS SUPPORTED FROM SAID FRAME FOR OPERATING EACH BEAM SUBSTANTIALLY VERTICALLY AT LEAST AT ONE END THROUGH SUCCESSIVE STROKES, COMPRISING MEANS FOR MOVING SAID BEAM DURING EACH STROKE OF A CYCLE FROM A POSITION IN WHICH THE TEETH ON THE BEAM ARE LOCATED ABOVE THE CRUST DOWNWARDLY TO A POSITION IN WHICH THE TEETH PERFORATE AND BREAK THE CRUST AND FOR MOVING THE BEAM DURING THE NEXT STROKE OF THE
Claim 2
Dependent Claim
176 words
IN AN ELECTROLYTIC FURNANCE FOR THE PRODUCTION OF ALUMINUM WITH THE USE OF A MOLTEN SALT BATH, THE COMBINATION COMPRISING A FRAME, ANODES FOR SAID FURNANCE, MEANS SUPPORTING SAID ANODES FROM SAID FRAME IN TWO ROWS SEPARATED BY A GAP THEREBETWEEN EXTENDING ALONG THE FULL LENGTH OF THE REGION OCCUPIED BY SAID ANODES AND DIRECTLY ABOVE THE AREA WHERE A CRUST IS FORMED ON THE ELECTROCLYTE, AN A CRUST BREAKER COMPRISING ONE OR MORE SUBSTANTIALLY HORIZONTAL BEAMS EXTENDING IN AND ALONG SUBSTANTIALLY THE FULL LENGTH OF SAID GAP AND PROVIDED WITH SUBSTANTIALLY VERTICALLY DOWNWARDLY DIRECTED TEETH DISTRIBUTED SUBSTANTIALLY ALONG THE FULL LENGTH OF SAID GAP, AND MEANS SUPPORTED FROM SAID FRAME FOR OPERATING EACH BEAM SUBSTANTIALLY VERTICALLY AT LEAST AT ONE END THROUGH SUCCESSIVE STROKES, COMPRISING MEANS FOR MOVING SAID BEAM DURING EACH STROKE OF A CYCLE FROM A POSITION IN WHICH THE TEETH ON THE BEAM ARE LOCATED ABOVE THE CRUST DOWNWARDLY TO A POSITION IN WHICH THE TEETH PERFORATE AND BREAK THE CRUST AND FOR MOVING THE BEAM DURING THE NEXT STROKE OF THE
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) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |