Patent US2439589A successfully refreshed from Google Patents.
US2897387A
Expired / Lapsed
US
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Induction motor
Assignee: ELEKTRO MOTOREN A G
•
Filing: 1950-05-23
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Granted: 1959-07-28
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Expires: 1970-05-23
Abstract
No abstract record available.
Inventors
- 👤 Welter Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:48
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/16; H02K1/00; H02K1/06; H02K1/12; H02K1/14; H02K1/146; H02K17/04; H02K17/30; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1282
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |