Patent US2997612A successfully refreshed from Google Patents.
US2997612A
Expired / Lapsed
US
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Self starting synchronous motor
Assignee: Landis and Gyr AG
•
Filing: 1958-10-03
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Granted: 1961-08-22
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Expires: 1978-10-03
Abstract
No abstract record available.
Inventors
- 👤 Jager Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/02; H02K21/04; H02K21/042; H02K21/044
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2227894A
Cited
US2589999A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |