US2874103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for replacing the pot of an electrolytic cell for the production of aluminum
Assignee: Aluminium Industrie AG
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Filing: 1957-02-26
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Granted: 1959-02-17
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Syz Werner
- 👤 Muller Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:42
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
THE METHOD OF REPLACING THE WORN POT OF AN ELECTROLYTIC CELL IN A CELL LINE IN THE PRODUCTION OF ALUMINUM FROM A BATH OF MOLTEN FLUORIDES, WHICH METHOD COMPRISES BAKING OUTSIDE THE CELL LINE FRESH CARBON LINING ON A REPLACING POT WHILE THE LATTER POT IS OUTSIDE THE CELL LINE, MAINTAINING THE TEMPERATURE OF THE FRESH BAKED CARBON LINING IN THE REPLACING POT AT A TEMPERATURE OF AT LEAST 500*C. UNTIL SAID REPLACING POT IS INSTALLED IN THE CELL LINE, REPLACING THE WORN POT IN THE CELL LINE BY THE REPLACING POT WHILE THE BAKED CARBON LINING IN THE LATTER POT IS AT SAID TEMPERATURE, AND PLACING THE LATTER POT IN OPERATION IN SAID CELL LINE WHILE ITS BAKED LINING IS AT SAID TEMPERATURE, THE FRESH CARBON LINING IN SAID REPLACING POT BEING MAINTAINED AT SAID TEMPERATURE CONTINUOUSLY THROUGHOUT THE OPERATION FROM THE TIME SAID FRESH CARBON LINING IS BAKED IN SAID REPLACING POT TO THE TIME SAID RELPACING POT IS PLACED INTO OPERATION IN SAID CELL LINE.
Claim 2
Independent Claim
168 words
THE METHOD OF REPLACING THE WORN POT OF AN ELECTROLYTIC CELL IN A CELL LINE IN THE PRODUCTION OF ALUMINUM FROM A BATH OF MOLTEN FLUORIDES, WHICH METHOD COMPRISES BAKING OUTSIDE THE CELL LINE FRESH CARBON LINING ON A REPLACING POT WHILE THE LATTER POT IS OUTSIDE THE CELL LINE, MAINTAINING THE TEMPERATURE OF THE FRESH BAKED CARBON LINING IN THE REPLACING POT AT A TEMPERATURE OF AT LEAST 500*C. UNTIL SAID REPLACING POT IS INSTALLED IN THE CELL LINE, REPLACING THE WORN POT IN THE CELL LINE BY THE REPLACING POT WHILE THE BAKED CARBON LINING IN THE LATTER POT IS AT SAID TEMPERATURE, AND PLACING THE LATTER POT IN OPERATION IN SAID CELL LINE WHILE ITS BAKED LINING IS AT SAID TEMPERATURE, THE FRESH CARBON LINING IN SAID REPLACING POT BEING MAINTAINED AT SAID TEMPERATURE CONTINUOUSLY THROUGHOUT THE OPERATION FROM THE TIME SAID FRESH CARBON LINING IS BAKED IN SAID REPLACING POT TO THE TIME SAID RELPACING POT IS PLACED INTO OPERATION IN SAID CELL LINE.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |