Patent US2939824A successfully refreshed from Google Patents.
US2939824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the production of aluminum
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1957-07-26
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Granted: 1960-06-07
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Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Greenfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:06
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
58 words
IN THE ART OF FUSED BATH ELECTROLYSIS WHEREIN THE PROBLEM OF ANODE EFFECT IS PRESENT, THE IMPROVEMENT FOR THE SUPPRESSION OF SAID ANODE EFFECT COMPRISING THE STEPS OF PRODUCING PERIODICALLY VARYING ELECTRICAL ENERGY CHARACTERIZED BY HIGH PEAK VOLTAGES AND A REPETITION RATE OF NOT LESS THAN 180 CYCLES PER SECOND, AND IMPRESSING SAID ENERGY ACROSS SAID ELECTROLYTIC CELL.
Claim 2
Dependent Claim
58 words
IN THE ART OF FUSED BATH ELECTROLYSIS WHEREIN THE PROBLEM OF ANODE EFFECT IS PRESENT, THE IMPROVEMENT FOR THE SUPPRESSION OF SAID ANODE EFFECT COMPRISING THE STEPS OF PRODUCING PERIODICALLY VARYING ELECTRICAL ENERGY CHARACTERIZED BY HIGH PEAK VOLTAGES AND A REPETITION RATE OF NOT LESS THAN 180 CYCLES PER SECOND, AND IMPRESSING SAID ENERGY ACROSS SAID ELECTROLYTIC CELL.
Claim 3
Dependent Claim
152 words
A FUSED BATH ELECTROLYTIC CELL SYSTEM COMPRISING A CATHODE, AN ANODE, AN ELECTROLYTE, MEANS FOR CONDUCTING LOW-VOLTAGE DIRECT CURRENT ENERGY THROUGH SAID ELECTROLYTIC CELL, A SOURCE OF HIGH-VOLTAGE PULSES OF SHORT DURATION, SAID PULSES HAVING A REPETITION RATE OF NOT LESS THAN 180 CYCLES PER SECOND, MEANS FOR IMPRESSING SAID PULSES ACROSS THE ANODE TO ELECTROLYTE INTERFACE OF SAID ELECTROLYTIC CELL WITH ONSET OF ANODE EFFECT THEREIN, GLOW LAMP MEANS IN PARALLEL WITH SAID ELECTROLYTIC CELL AND THE SOURCE OF SAID LOW-VOLTAGE DIRECT CURRENT, SAID GLOW LAMP PRESENTING AN OPEN CIRCUIT TO A LOW VOLTAGE, BUT WHICH DISCHARGES PROVIDING A CONDUCTING PATH WHEN IMPRESSED WITH A HIGHVOLTAGE, AND A SUITABLE IMPEDANCE IN SERIES WITH SAID LOW-VOLTAGE DIRECT CURRENT ENERGY AND WITH SAID GLOW LAMP TO SAID SOURCE OF HIGH VOLTAGE PULSES WHEREBY SAID SPECT TO SAID SOURCE OF HIGH VOLTAGE PULSES WHEREBY SAID LOW-VOLTAGE D.C. SOURCE IS EFFECTIVELY ISOLATED FROM SAID PULSES.
Claim 4
Dependent Claim
152 words
A FUSED BATH ELECTROLYTIC CELL SYSTEM COMPRISING A CATHODE, AN ANODE, AN ELECTROLYTE, MEANS FOR CONDUCTING LOW-VOLTAGE DIRECT CURRENT ENERGY THROUGH SAID ELECTROLYTIC CELL, A SOURCE OF HIGH-VOLTAGE PULSES OF SHORT DURATION, SAID PULSES HAVING A REPETITION RATE OF NOT LESS THAN 180 CYCLES PER SECOND, MEANS FOR IMPRESSING SAID PULSES ACROSS THE ANODE TO ELECTROLYTE INTERFACE OF SAID ELECTROLYTIC CELL WITH ONSET OF ANODE EFFECT THEREIN, GLOW LAMP MEANS IN PARALLEL WITH SAID ELECTROLYTIC CELL AND THE SOURCE OF SAID LOW-VOLTAGE DIRECT CURRENT, SAID GLOW LAMP PRESENTING AN OPEN CIRCUIT TO A LOW VOLTAGE, BUT WHICH DISCHARGES PROVIDING A CONDUCTING PATH WHEN IMPRESSED WITH A HIGHVOLTAGE, AND A SUITABLE IMPEDANCE IN SERIES WITH SAID LOW-VOLTAGE DIRECT CURRENT ENERGY AND WITH SAID GLOW LAMP TO SAID SOURCE OF HIGH VOLTAGE PULSES WHEREBY SAID SPECT TO SAID SOURCE OF HIGH VOLTAGE PULSES WHEREBY SAID LOW-VOLTAGE D.C. SOURCE IS EFFECTIVELY ISOLATED FROM SAID PULSES.
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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |