Patent US3389317A successfully refreshed from Google Patents.
US3389317A
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System for maintaining an electric motor at a predetermined speed
Assignee: Motors Liquidation Co
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Filing: 1966-03-21
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Granted: 1968-06-18
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Expires: 1986-03-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Prewitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:36
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/063; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/924; Y10S388/926
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A SYSTEM FOR MAINTAINING AN ELECTRIC MOTOR AT A PREDETERMINED SPEED COMPRISING IN COMBINATION WITH AN ELECTRIC MOTOR AND A SOURCE OF SUPPLY POTENTIAL, A ROTATABLE MEMBER WHICH IS REVOLVABLE AT A SPEED WHICH IS A FUNCTION OF THE SPEED OF SAID MOTOR, A PERMANENT MAGNET, MOUNTING MEANS WHICH PERMITS DISPLACEMENT OF SAID PERMANENT MAGNET BY A DISTANCE PROPORTIONAL TO ROTATIONAL SPEED FOR MOUNTING SAID PERMANENT MAGNET UPON SAID ROTATABLE
Claim 2
Independent Claim
70 words
A SYSTEM FOR MAINTAINING AN ELECTRIC MOTOR AT A PREDETERMINED SPEED COMPRISING IN COMBINATION WITH AN ELECTRIC MOTOR AND A SOURCE OF SUPPLY POTENTIAL, A ROTATABLE MEMBER WHICH IS REVOLVABLE AT A SPEED WHICH IS A FUNCTION OF THE SPEED OF SAID MOTOR, A PERMANENT MAGNET, MOUNTING MEANS WHICH PERMITS DISPLACEMENT OF SAID PERMANENT MAGNET BY A DISTANCE PROPORTIONAL TO ROTATIONAL SPEED FOR MOUNTING SAID PERMANENT MAGNET UPON SAID ROTATABLE
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) | 1971-06-18 | 1971-12-18 | 1972-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-18 | 1975-12-18 | 1976-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-18 | 1979-12-18 | 1980-06-18 | $7700.00 | Window Closed / Lapsed |