Patent US4962444A successfully refreshed from Google Patents.
Patent US2739113A successfully refreshed from Google Patents.
US2739113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic cell with self-baking anode
Assignee: Reynolds Metals Co
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Filing: 1952-04-12
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Granted: 1956-03-20
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Expires: 1972-04-12
Abstract
No abstract record available.
Inventors
- 👤 Basil T Horsfield
- 👤 Dwight P Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:53
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN AN ELECTROLYTIC CELL SUITABLE FOR USE IN THE PRODUCTION OF ALUMINUM BY THE ELECTROLYSIS OF A BATH OF MOLTEN CRYOLITE HAVING ALUMINA DISSOLVED THEREIN, WHICH CELL IS PROVIDED WITH A DOWNWARDLY FEEDING, SELF-BAKING ANODE WHICH IN HORIZONTAL CROSS-SECTION IS SUBSTANTIALLY RECTANGULAR AND OF SUBSTANTIALLY GREATER LENGTH THAN BREADTH AND WHICH DURING ITS DOWNWARD PASSAGE IS ENCASED ON ITS VERTICAL FACES BY SEVERAL COURSES OF CHANNELS WHICH ARE SUPPORTED VERTICALLY FROM ABOVE AT THE FOUR CORNERS OF THE ANODE AND WHICH IN TURN SUPPORT THE ANODE BY MEANS OF PINS INSERTED INTO THE ANODE THROUGH HOLES IN THE WEBS OF THE CHANNELS, SUCH PINS ALSO SERVING AS MEANS WHEREBY ELECTRICAL CURRENT IS SUPPLIED TO THE ANODE, THE IMPROVEMENT WHICH COMPRISES THE COMBINATION OF AT LEAST TWO INDIVIDUAL SECTIONS OF CHANNEL IN EACH COURSE ADJACENT EACH OF THE LONG VERTICAL FACES OF THE ANODE, FIRST MEANS SLIDABLY RECEIVED HORIZONTALLY AT ITS OPPOSITE ENDS BY THE ADJACENT ENDS OF EACH ADJACENT PAIR OF INDIVIDUAL
Claim 2
Dependent Claim
162 words
IN AN ELECTROLYTIC CELL SUITABLE FOR USE IN THE PRODUCTION OF ALUMINUM BY THE ELECTROLYSIS OF A BATH OF MOLTEN CRYOLITE HAVING ALUMINA DISSOLVED THEREIN, WHICH CELL IS PROVIDED WITH A DOWNWARDLY FEEDING, SELF-BAKING ANODE WHICH IN HORIZONTAL CROSS-SECTION IS SUBSTANTIALLY RECTANGULAR AND OF SUBSTANTIALLY GREATER LENGTH THAN BREADTH AND WHICH DURING ITS DOWNWARD PASSAGE IS ENCASED ON ITS VERTICAL FACES BY SEVERAL COURSES OF CHANNELS WHICH ARE SUPPORTED VERTICALLY FROM ABOVE AT THE FOUR CORNERS OF THE ANODE AND WHICH IN TURN SUPPORT THE ANODE BY MEANS OF PINS INSERTED INTO THE ANODE THROUGH HOLES IN THE WEBS OF THE CHANNELS, SUCH PINS ALSO SERVING AS MEANS WHEREBY ELECTRICAL CURRENT IS SUPPLIED TO THE ANODE, THE IMPROVEMENT WHICH COMPRISES THE COMBINATION OF AT LEAST TWO INDIVIDUAL SECTIONS OF CHANNEL IN EACH COURSE ADJACENT EACH OF THE LONG VERTICAL FACES OF THE ANODE, FIRST MEANS SLIDABLY RECEIVED HORIZONTALLY AT ITS OPPOSITE ENDS BY THE ADJACENT ENDS OF EACH ADJACENT PAIR OF INDIVIDUAL
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |