Patent US3287247A successfully refreshed from Google Patents.
US3287247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell for the production of aluminum
Assignee: Reynolds Metals Co
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Filing: 1962-07-24
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Granted: 1966-11-22
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Expires: 1982-07-24
Abstract
No abstract record available.
Inventors
- 👤 John L Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
182 words
AN ELECTROLYTIC CELL FOR THE REDUCTION OF ALUMINA TO PRODUCE ALUMINUM, COMPRISING A POT SHELL, A LINING OF ELECTRICALLY INSULATIVE REFRACTORY MATERIAL WITHIN SAID SHELL TO CONTAIN A BATH OF DISSOLVED ALUMINA AND AN UNDERLYING PAD OF MOLTEN ALUMINUM, A COMPOSITE ELECTRODE HAVING A STEM PORTION COMPRISING A METAL BAR WHICH TERMINATES INWARDLY OF THE CELL WITHIN SAID LINING IN CLOSE PROXIMITY TO THE PAD OF MOLTEN ALUMINUM, AND HAVING A REFRACTORY HARD METAL CURRENT COLLECTOR ATTACHED TO THE INNER TERMINAL END OF SAID STEM PORTION, SAID COLLECTOR PROJECTING THROUGH THE LINING TO BE AT LEAST PARTIALLY EXPOSED TO THE PAD OF MOLTEN ALUMINUM IN THE CELL, AN ANNULAR SLEEVE AROUND SAID BAR AND SPACED THEREFROM, SAID CURRENT COLLECTOR CONTRACTING THE ADJACENT END OF SAID SLEEVE TO FORM A SEAL THEREBETWEEN, SAID SLEEVE SERVING TO BLOCK INGRESS OF MOLTEN CONTENTS OF THE CELL ALONG THE BAR SURFACES INWARDLY OF SAID LINING, THE OPPOSITE END OF THE BAR FROM SAID COLLECTOR EXTENDING BEYOND SAID SLEEVE AND THROUGH AN OPENING IN THE SHELL, AND MEANS ADJACENT SAID OPENING FOR EXCLUDING AIR FROM SAID SLEEVE.
Claim 2
Dependent Claim
182 words
AN ELECTROLYTIC CELL FOR THE REDUCTION OF ALUMINA TO PRODUCE ALUMINUM, COMPRISING A POT SHELL, A LINING OF ELECTRICALLY INSULATIVE REFRACTORY MATERIAL WITHIN SAID SHELL TO CONTAIN A BATH OF DISSOLVED ALUMINA AND AN UNDERLYING PAD OF MOLTEN ALUMINUM, A COMPOSITE ELECTRODE HAVING A STEM PORTION COMPRISING A METAL BAR WHICH TERMINATES INWARDLY OF THE CELL WITHIN SAID LINING IN CLOSE PROXIMITY TO THE PAD OF MOLTEN ALUMINUM, AND HAVING A REFRACTORY HARD METAL CURRENT COLLECTOR ATTACHED TO THE INNER TERMINAL END OF SAID STEM PORTION, SAID COLLECTOR PROJECTING THROUGH THE LINING TO BE AT LEAST PARTIALLY EXPOSED TO THE PAD OF MOLTEN ALUMINUM IN THE CELL, AN ANNULAR SLEEVE AROUND SAID BAR AND SPACED THEREFROM, SAID CURRENT COLLECTOR CONTRACTING THE ADJACENT END OF SAID SLEEVE TO FORM A SEAL THEREBETWEEN, SAID SLEEVE SERVING TO BLOCK INGRESS OF MOLTEN CONTENTS OF THE CELL ALONG THE BAR SURFACES INWARDLY OF SAID LINING, THE OPPOSITE END OF THE BAR FROM SAID COLLECTOR EXTENDING BEYOND SAID SLEEVE AND THROUGH AN OPENING IN THE SHELL, AND MEANS ADJACENT SAID OPENING FOR EXCLUDING AIR FROM SAID SLEEVE.
Claim 3
Dependent Claim
159 words
IN AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM, HAVING A CHAMBER ADAPTED TO CONTAIN THE MOLTEN CONTENTS OF THE CELL INCLUDING A PAD OF MOLTEN ALUMINUM, AND HAVING A BOTTOM LINING OF THE CELL DEFINING SAID CHAMBER AND PROVIDING AN INTERIOR SURFACE DISPOSED IN CONTACT WITH SUBSTANTIALLY THE ENTIRE LOWER SURFACE OF SAID MOLTEN CONTENTS, THE IMPROVEMENT COMPRISING: AN ELECTRODE ENTERING THE CELL THROUGH SAID INTERIOR SURFACE OF THE LINING, HAVING A STEM PORTION COMPOSED OF AN ELEMENTAL METAL OR ALLOY THEREOF TERMINATING INWARDLY OF THE CELL WITHIN SAID LINING IN CLOSE PROXIMITY TO THE PAD OF MOLTEN ALUMINUM, SAID ELECTRODE ALSO HAVING A REFRACTORY HARD METAL END PORTION PROVIDING A SURFACE IN CONTACT WITH SAID MOLTEN CONTENTS OF THE CELL; AND A PROTECTIVE SLEEVE AROUND THE ELECTRODE TO BLOCK INGRESS OF MOLTEN CONTENTS ALONG THE ELECTRODE SURFACES INWARDLY OF SAID LINING, SAID SLEEVE BEING PROTECTED AGAINST OXIDATION BY A SURFACE COATING COMPOSED OF CRYOLITE IN PHOSPHORIC ACID.
Claim 4
Dependent Claim
159 words
IN AN ELECTROLYTIC CELL FOR THE PRODUCTION OF ALUMINUM, HAVING A CHAMBER ADAPTED TO CONTAIN THE MOLTEN CONTENTS OF THE CELL INCLUDING A PAD OF MOLTEN ALUMINUM, AND HAVING A BOTTOM LINING OF THE CELL DEFINING SAID CHAMBER AND PROVIDING AN INTERIOR SURFACE DISPOSED IN CONTACT WITH SUBSTANTIALLY THE ENTIRE LOWER SURFACE OF SAID MOLTEN CONTENTS, THE IMPROVEMENT COMPRISING: AN ELECTRODE ENTERING THE CELL THROUGH SAID INTERIOR SURFACE OF THE LINING, HAVING A STEM PORTION COMPOSED OF AN ELEMENTAL METAL OR ALLOY THEREOF TERMINATING INWARDLY OF THE CELL WITHIN SAID LINING IN CLOSE PROXIMITY TO THE PAD OF MOLTEN ALUMINUM, SAID ELECTRODE ALSO HAVING A REFRACTORY HARD METAL END PORTION PROVIDING A SURFACE IN CONTACT WITH SAID MOLTEN CONTENTS OF THE CELL; AND A PROTECTIVE SLEEVE AROUND THE ELECTRODE TO BLOCK INGRESS OF MOLTEN CONTENTS ALONG THE ELECTRODE SURFACES INWARDLY OF SAID LINING, SAID SLEEVE BEING PROTECTED AGAINST OXIDATION BY A SURFACE COATING COMPOSED OF CRYOLITE IN PHOSPHORIC ACID.
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) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |