Patent US3303402A successfully refreshed from Google Patents.
US3303402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single phase induction motor
Assignee: Phillips Petroleum Co
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Filing: 1964-01-09
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Granted: 1967-02-07
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Expires: 1984-01-09
Abstract
No abstract record available.
Inventors
- 👤 Robert L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:13
CPC Classifications
H; H02; H02P; H02P1/00; H02P1/16; H02P1/42; H02P1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
APPARATUS COMPRISING A SINGLE PHASE MOTOR HAVING A SQUIRREL-CAGE ROTOR, A MAIN WINDING, AN AUXILIARY WINDING, AND FIRST AND SECOND POWER INPUT TERMINALS; MEANS FOR CONNECTING SAID MAIN WINDING BETWEEN SAID FIRST AND SECOND POWER INPUT TERMINALS; FIRST AND SECOND CAPACITORS; A POSITIVE TEMPERATURE COEFFICIENT RESISTOR; MEANS FOR CONNECTING SAID AUXILIARY WINDING, SAID FIRST CAPACITOR AND SAID POSITIVE TEMPERATURE COEFFICIENT RESISTOR IN SERIES BETWEEN SAID FIRST AND SECOND POWER INPUT TERMINALS; AND MEANS FOR CONNECTING SAID SECOND CAPACITOR IN PARALLEL WITH THE SERIES COMBINATION OF SAID FIRST CAPACITOR AND SAID POSITIVE TEMPERATURE COEFFICIENT RESISTOR.
Claim 2
Dependent Claim
94 words
APPARATUS COMPRISING A SINGLE PHASE MOTOR HAVING A SQUIRREL-CAGE ROTOR, A MAIN WINDING, AN AUXILIARY WINDING, AND FIRST AND SECOND POWER INPUT TERMINALS; MEANS FOR CONNECTING SAID MAIN WINDING BETWEEN SAID FIRST AND SECOND POWER INPUT TERMINALS; FIRST AND SECOND CAPACITORS; A POSITIVE TEMPERATURE COEFFICIENT RESISTOR; MEANS FOR CONNECTING SAID AUXILIARY WINDING, SAID FIRST CAPACITOR AND SAID POSITIVE TEMPERATURE COEFFICIENT RESISTOR IN SERIES BETWEEN SAID FIRST AND SECOND POWER INPUT TERMINALS; AND MEANS FOR CONNECTING SAID SECOND CAPACITOR IN PARALLEL WITH THE SERIES COMBINATION OF SAID FIRST CAPACITOR AND SAID POSITIVE TEMPERATURE COEFFICIENT 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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |