Patent JPH02216259A successfully refreshed from Google Patents.
US2565157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase induction motor control
Assignee: Westinghouse Electric Corp
•
Filing: 1946-12-14
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Granted: 1951-08-21
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Expires: 1966-12-14
Abstract
No abstract record available.
Inventors
- 👤 William R Wickerham
- 👤 Curt M Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:32
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/02; H02P27/026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1376453A
Cited
US1849646A
Cited
US2228078A
Cited
US2287459A
Cited
US2411608A
Cited
US2440319A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-20 | 1955-02-19 | 1955-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-20 | 1959-02-19 | 1959-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-20 | 1963-02-19 | 1963-08-21 | $7700.00 | Window Closed / Lapsed |