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US3536968A
Expired / Lapsed
US
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Control for three-phase synchronous-interlock motor system which prevents starting if the motors are out of alignment
Assignee: BAE Systems Electronics Ltd
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Filing: 1968-04-01
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Granted: 1970-10-27
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Expires: 1988-04-01
Abstract
No abstract record available.
Inventors
- 👤 Richard Phillips Alabone
- 👤 John Haydn Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:04
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/74; H01; H01F; H01F29/00; H01F29/02; H01F29/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2074129A
Cited
US2246333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |