US3027469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional drive control for selfstarting synchronous motors of either starting direction
Assignee: Ingraham Co
•
Filing: 1959-09-28
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Granted: 1962-03-27
•
Expires: 1979-09-28
Abstract
No abstract record available.
Inventors
- 👤 Philip A Sidell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/10; H02K7/118; H02K7/1185; H03; H03K; H03K17/00; H03K17/94; H03K17/945; H03K17/95; H03K17/9512
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2766863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |