Patent US2744736A successfully refreshed from Google Patents.
Patent US2917441A successfully refreshed from Google Patents.
US2917441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self baking electrode construction
Assignee: Reading Anthracite Co
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Filing: 1955-12-28
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Granted: 1959-12-15
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 Donald Harold Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:38
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
IN A METHOD OF PERFORMING ELECTROLYTIC REDUCTION OF ALUMINA IN A FUSED CRYOLITE BATH FED WITH ALUMINA OUTSIDE OF THE ELECTRODE BY PASSING ELECTRICAL CURRENT THROUGH A SODERBERG CONTINUOUS SELF-BAKING CARBONACEOUS PASTE ANODE WHICH IMMERSED IN SAID FUSED BATH, SAID ANODE CONSISTING OF A HYDROCARBON BINDER AND CONDUCTING CARBON, THE IMPROVEMENT IN REMOVING GASES RESULTING FROM THE BAKING OF SAID PASTE ANODE AND OXIDATION OF SAID ANODE IN SAID BATH COMPRISING INSERTING OPEN-ENDED HOLLOW ALUMINUM TUBES INTO AND THROUGH THE MASS OF SAID PASTE ANODE ALONG THE LENGTH THEREOF, SAID OPEN ENDED TUBES BEING SPACED UNIFORMLY APART OVER THE CROSS SECTIONAL AREA OF SAID ANODE, FITTING THE END OF EACH OF SAID TUBES WITH FELXIBLE CONNECTORS, FITTING SAID FLEXIBLE CONNECTORS TO EXHAUST MEANS AND IMMERSING SAID ELECTRODE BELOW THE SURFACE OF THE MOLTEN ELECTROLYTIC BATH WHEREBY GASES FORMED AT THE BASE OF SAID ELECTRODE PASS THROUGH SAID HOLLOW ALUMINUM TUBES IN SAID ANODE DURING BAKING AND OXIDATION OF SAID ANODE AS SOON AS SAID GASES ARE FORMED AT SAID ANODE IN SAID BATH.
Claim 2
Dependent Claim
173 words
IN A METHOD OF PERFORMING ELECTROLYTIC REDUCTION OF ALUMINA IN A FUSED CRYOLITE BATH FED WITH ALUMINA OUTSIDE OF THE ELECTRODE BY PASSING ELECTRICAL CURRENT THROUGH A SODERBERG CONTINUOUS SELF-BAKING CARBONACEOUS PASTE ANODE WHICH IMMERSED IN SAID FUSED BATH, SAID ANODE CONSISTING OF A HYDROCARBON BINDER AND CONDUCTING CARBON, THE IMPROVEMENT IN REMOVING GASES RESULTING FROM THE BAKING OF SAID PASTE ANODE AND OXIDATION OF SAID ANODE IN SAID BATH COMPRISING INSERTING OPEN-ENDED HOLLOW ALUMINUM TUBES INTO AND THROUGH THE MASS OF SAID PASTE ANODE ALONG THE LENGTH THEREOF, SAID OPEN ENDED TUBES BEING SPACED UNIFORMLY APART OVER THE CROSS SECTIONAL AREA OF SAID ANODE, FITTING THE END OF EACH OF SAID TUBES WITH FELXIBLE CONNECTORS, FITTING SAID FLEXIBLE CONNECTORS TO EXHAUST MEANS AND IMMERSING SAID ELECTRODE BELOW THE SURFACE OF THE MOLTEN ELECTROLYTIC BATH WHEREBY GASES FORMED AT THE BASE OF SAID ELECTRODE PASS THROUGH SAID HOLLOW ALUMINUM TUBES IN SAID ANODE DURING BAKING AND OXIDATION OF SAID ANODE AS SOON AS SAID GASES ARE FORMED AT SAID ANODE IN SAID BATH.
Claim 3
Dependent Claim
144 words
IN COMBINATION, A SODERBERG CONTINUOUS SELF BAKING PASTE ELECTRODE CONSISTING OF A HYDROCARBON BINDER AND CONDUCTING CARBON A PLURALITY OF OPEN-ENDED HOLLOW ALUMINUM TUBES EXTENDING INTO AND THROUGH THE ENTIRE LENGTH OF SAID ELECTRODE, SAID PLURALITY OF OPEN ENDED ALUMINUM TUBES BEING SPACED APART EACH AT A UNIFORM DISTANCE ACROSS THE CROSS SECTIONAL AREA OF SAID ELECTRODE, EXHAUST MEANS IN COMMUNICATION WITH THE OPEN END OF EACH OF SAID TUBES OPPOSITE THE END OF SAID ELECTRODE WHICH IS IMMERSED IN THE FUSED ELECTROLYTE BATH, THE OPEN END OF EACH OF SAID TUBES BEING FITTED WITH FLEXIBLE CONNECTORS AT SAID OPPOSITE END WHICH ARE IN COMMUNICATION WITH SAID EXHAUST MEANS AND INDUCED DRAFT MEANS FOR SAID EXHAUST MEANS WIHC EXHAUSTS THE GASES PASSING THROUGH SAID VERTICAL ALUMINUM TUBES, FLEXIBLE CONNECTOR AND EXHAUST MEANS UPON BAKING AND USING THE ELECTRODE IN A FUSED CRYOLITE ALUMINA BATH.
Claim 4
Dependent Claim
144 words
IN COMBINATION, A SODERBERG CONTINUOUS SELF BAKING PASTE ELECTRODE CONSISTING OF A HYDROCARBON BINDER AND CONDUCTING CARBON A PLURALITY OF OPEN-ENDED HOLLOW ALUMINUM TUBES EXTENDING INTO AND THROUGH THE ENTIRE LENGTH OF SAID ELECTRODE, SAID PLURALITY OF OPEN ENDED ALUMINUM TUBES BEING SPACED APART EACH AT A UNIFORM DISTANCE ACROSS THE CROSS SECTIONAL AREA OF SAID ELECTRODE, EXHAUST MEANS IN COMMUNICATION WITH THE OPEN END OF EACH OF SAID TUBES OPPOSITE THE END OF SAID ELECTRODE WHICH IS IMMERSED IN THE FUSED ELECTROLYTE BATH, THE OPEN END OF EACH OF SAID TUBES BEING FITTED WITH FLEXIBLE CONNECTORS AT SAID OPPOSITE END WHICH ARE IN COMMUNICATION WITH SAID EXHAUST MEANS AND INDUCED DRAFT MEANS FOR SAID EXHAUST MEANS WIHC EXHAUSTS THE GASES PASSING THROUGH SAID VERTICAL ALUMINUM TUBES, FLEXIBLE CONNECTOR AND EXHAUST MEANS UPON BAKING AND USING THE ELECTRODE IN A FUSED CRYOLITE ALUMINA BATH.
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) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |