US2930746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of reduction pot lines
Assignee: Individual
•
Filing: 1957-01-10
•
Granted: 1960-03-29
•
Expires: 1977-01-10
Abstract
No abstract record available.
Inventors
- 👤 Robert J Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:48
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
IN A REDUCTION SYSTEM FOR METALS SUCH AS ALUMINUM WHEREIN A PLURALITY OF POTS, EACH EMBODYING A CATHODE AND AN ANODE AND EACH ADAPTED TO CONTAIN A MOLTEN ELECTROLYTIC BATH INTO WHICH THE COMPOUND TO BE REDUCED IS INTRODUCED SAID DISSOLVED, ARE INTERCONNECTED IN SERIES TO A SOURCE OF CURRENT, THE IMPROVEMENT IN CONTROL MEANS FOR SAID POTS COMPRISING POWER MEANS OPERATIVELY CONNECTED TO EACH OF THE ANODES FOR MOVING THEM TOWARD AND AWAY FROM THE CATHODES, MEANS RESPONSIVE TO THE AMOUNT OF CURRENT FLOW THROUGH THE POTS AND CONTINUOUSLY OPERATIVELY CONNECTED TO THE POWER MEANS OF EACH POT TENDING TO CAUSE THE POWER MEANS TO MOVE THE ANODES TOWARD THE CATHODES UPON DECREASE IN CURRENT FLOW THROUGH THE POTS AND TENDING THE CAUSE THE POWER MEANS TO MOVE THE ANODES AWAY FROM THE CATHODES UPON INCREASE IN CURRENT FLOW THROUGH THE POTS, MEANS INDIVIDUAL TO EACH POT RESPONSIVE TO VARIATIONS IN VOLTAGE ACROSS THE POT AND CONTINUOUSLY OPERATIVELY CONNECTED TO THE POWER MEANS OF THAT POT, CONTINUOUSLY TENDING TO CAUSE THE POWER MEANS TO MOVE THE ANODE CLOSER TO THE CATHODE UPON A RISE IN VOLTAGE ACROSS THE POT AND TO MOVE THE ANODE AWAY FROM THE CATHODE UPON A FALL IN VOLTAGE ACROSS THE POT, AND MEANS
Claim 2
Dependent Claim
209 words
IN A REDUCTION SYSTEM FOR METALS SUCH AS ALUMINUM WHEREIN A PLURALITY OF POTS, EACH EMBODYING A CATHODE AND AN ANODE AND EACH ADAPTED TO CONTAIN A MOLTEN ELECTROLYTIC BATH INTO WHICH THE COMPOUND TO BE REDUCED IS INTRODUCED SAID DISSOLVED, ARE INTERCONNECTED IN SERIES TO A SOURCE OF CURRENT, THE IMPROVEMENT IN CONTROL MEANS FOR SAID POTS COMPRISING POWER MEANS OPERATIVELY CONNECTED TO EACH OF THE ANODES FOR MOVING THEM TOWARD AND AWAY FROM THE CATHODES, MEANS RESPONSIVE TO THE AMOUNT OF CURRENT FLOW THROUGH THE POTS AND CONTINUOUSLY OPERATIVELY CONNECTED TO THE POWER MEANS OF EACH POT TENDING TO CAUSE THE POWER MEANS TO MOVE THE ANODES TOWARD THE CATHODES UPON DECREASE IN CURRENT FLOW THROUGH THE POTS AND TENDING THE CAUSE THE POWER MEANS TO MOVE THE ANODES AWAY FROM THE CATHODES UPON INCREASE IN CURRENT FLOW THROUGH THE POTS, MEANS INDIVIDUAL TO EACH POT RESPONSIVE TO VARIATIONS IN VOLTAGE ACROSS THE POT AND CONTINUOUSLY OPERATIVELY CONNECTED TO THE POWER MEANS OF THAT POT, CONTINUOUSLY TENDING TO CAUSE THE POWER MEANS TO MOVE THE ANODE CLOSER TO THE CATHODE UPON A RISE IN VOLTAGE ACROSS THE POT AND TO MOVE THE ANODE AWAY FROM THE CATHODE UPON A FALL IN VOLTAGE ACROSS THE POT, AND MEANS
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) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |