US3305722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor starter circuit
Assignee: —
•
Filing: —
•
Granted: 1967-02-21
•
Expires: 1984-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:45
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
AN ELECTRIC MOTOR START CIRCUIT, COMPRISING, A MOTOR ARMATURE AND FIELD WINDING MEANS, A CURRENT SWITCH TRANSISTOR IN SERIES AT LEAST WITH SAID FIELD WINDING MEANS, A CURRENT CONTROL TRANSISTOR IN SERIES WITH THE SWITCH TRANSISTOR AND SAID MOTOR ARMATURE ONLY, AND A RESISTOR IN PARALLEL WITH ONLY THE CONTROL TRANSISTOR, SAID RESISTOR
Claim 2
Dependent Claim
53 words
AN ELECTRIC MOTOR START CIRCUIT, COMPRISING, A MOTOR ARMATURE AND FIELD WINDING MEANS, A CURRENT SWITCH TRANSISTOR IN SERIES AT LEAST WITH SAID FIELD WINDING MEANS, A CURRENT CONTROL TRANSISTOR IN SERIES WITH THE SWITCH TRANSISTOR AND SAID MOTOR ARMATURE ONLY, AND A RESISTOR IN PARALLEL WITH ONLY THE CONTROL TRANSISTOR, SAID RESISTOR
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |