US3345273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for indicating anode positions
Assignee: Reynolds Metals Co
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Filing: 1964-02-04
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Granted: 1967-10-03
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Expires: 1984-02-04
Abstract
No abstract record available.
Inventors
- 👤 Robert V Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:34
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD FOR DETERMINING THE RESENCE OF A LOW CARBON ANODE IN AN ELECTROLYTIC REDUCTION CELL FOR THE REDUCTION OF ALUMINUM DISSOLVED I A MLTEN ELECTROLYTE THE CELL HAVING MULTIPLE CARBON ANODES AND A CATHODE TO WHICH DC VOLTAGE IS APPLIED, THE METHOD COMPRISING THE STEPS OF: ELECTRICALLY CONNECTING ACROSS THE ANODES AND CATHODE DETECTION MEANS SENSITIVE TO LOW FREQUENCY VOLTAGE VARIATIONS IN THE NEIGHBORHOOD OF 1 TO 20 CYCLES PER SECOND SUPERIMPOSED ON THE APPLIED DC VOLTAGE; AND UTILIZING SAID DETECTION MEANS TO INDICATE THE OCCURENCE OF SAID VOLTAGE VARIATIONS CAUSED BY A LOW CARBON.
Claim 2
Independent Claim
96 words
A METHOD FOR DETERMINING THE RESENCE OF A LOW CARBON ANODE IN AN ELECTROLYTIC REDUCTION CELL FOR THE REDUCTION OF ALUMINUM DISSOLVED I A MLTEN ELECTROLYTE THE CELL HAVING MULTIPLE CARBON ANODES AND A CATHODE TO WHICH DC VOLTAGE IS APPLIED, THE METHOD COMPRISING THE STEPS OF: ELECTRICALLY CONNECTING ACROSS THE ANODES AND CATHODE DETECTION MEANS SENSITIVE TO LOW FREQUENCY VOLTAGE VARIATIONS IN THE NEIGHBORHOOD OF 1 TO 20 CYCLES PER SECOND SUPERIMPOSED ON THE APPLIED DC VOLTAGE; AND UTILIZING SAID DETECTION MEANS TO INDICATE THE OCCURENCE OF SAID VOLTAGE VARIATIONS CAUSED BY A LOW CARBON.
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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |