Patent US3305718A successfully refreshed from Google Patents.
US3305718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch control system for permanent magnet motors and the like
Assignee: Ambac International Corp
•
Filing: 1963-09-19
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Granted: 1967-02-21
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Expires: 1983-09-19
Abstract
No abstract record available.
Inventors
- 👤 Claude F Waldron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:04
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1868691A
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US2356828A
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US2293968A
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US2844683A
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US2755423A
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US3042773A
Cited
US3064172A
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US3222584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |