US3263616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid rheostat
Assignee: General Services Co
•
Filing: 1963-12-16
•
Granted: 1966-08-02
•
Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Paul E Hyde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:05
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/02; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/208
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A RECIRCULATING LIQUID RHEOSTAT FOR CONTROLLING THE SPEED OF A VARIABLE SPEED ELECTRIC MOTOR IN RESPONSE TO CHANGES IN DEMAND ON SAID MOTOR, SAID RHEOSTAT COMPRISING IN COMBINATION: (A) A HOUSING OF DIELECTRIC MATERIAL DEFINING AN ELECTRODE CHAMBER, A PLURALITY OF ELECTRODES, MEANS MOUNTING SAID ELECTRODES WITHIN SAID CHAMBER IN DIRECT CONFRONTATION WITH ONE ANOTHER SO THAT ELECTRICAL CURRENT CAN FLOW DIRECTLY BETWEEN SAID ELECTRODES SOLELY THROUGH AN ELECTROLYTE DISPOSED THEREBETWEEN, (B) AN ELECTROLYTE RESERVOIR BENEATH SAID ELECTRODE CHAMBER, (C) CONSTANT DIAMETER DRAIN MEANS IN SAID ELECTRODE CHAMBER FOR DISCHARGING ELECTROLYTE INTO SAID RESERVOIR,
Claim 2
Dependent Claim
94 words
A RECIRCULATING LIQUID RHEOSTAT FOR CONTROLLING THE SPEED OF A VARIABLE SPEED ELECTRIC MOTOR IN RESPONSE TO CHANGES IN DEMAND ON SAID MOTOR, SAID RHEOSTAT COMPRISING IN COMBINATION: (A) A HOUSING OF DIELECTRIC MATERIAL DEFINING AN ELECTRODE CHAMBER, A PLURALITY OF ELECTRODES, MEANS MOUNTING SAID ELECTRODES WITHIN SAID CHAMBER IN DIRECT CONFRONTATION WITH ONE ANOTHER SO THAT ELECTRICAL CURRENT CAN FLOW DIRECTLY BETWEEN SAID ELECTRODES SOLELY THROUGH AN ELECTROLYTE DISPOSED THEREBETWEEN, (B) AN ELECTROLYTE RESERVOIR BENEATH SAID ELECTRODE CHAMBER, (C) CONSTANT DIAMETER DRAIN MEANS IN SAID ELECTRODE CHAMBER FOR DISCHARGING ELECTROLYTE INTO SAID RESERVOIR,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |