Patent US2650314A successfully refreshed from Google Patents.
US2650314A
Expired / Lapsed
US
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Special purpose electric motor
Assignee: Individual
•
Filing: 1952-02-12
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Granted: 1953-08-25
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Expires: 1972-02-12
Abstract
No abstract record available.
Inventors
- 👤 George W Hennigh
- 👤 Harry D Ridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:29
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/12; H02K5/132
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US765078A
Cited
US1820985A
Cited
US1914714A
Cited
US2258064A
Cited
DE727813C
Cited
US2406959A
Cited
US2495895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |