Patent US2492207A successfully refreshed from Google Patents.
US2492207A
Expired / Lapsed
US
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Induction motor
Assignee: RUSSELL ELECTRIC Co
•
Filing: 1946-11-22
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Granted: 1949-12-27
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Earle W Ballentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:57
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04; H02K17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1952220A
Cited
US1992956A
Cited
US2071224A
Cited
US2122374A
Cited
US2261890A
Cited
US2344401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |