Patent US3521137A successfully refreshed from Google Patents.
US3521137A
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US
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Control circuit for hybrid prime mover electric motor system
Assignee: Continental Aviation and Engineering Corp
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Filing: 1967-11-03
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Granted: 1970-07-21
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Expires: 1987-11-03
Abstract
No abstract record available.
Inventors
- 👤 Harry Van Sweden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:30
CPC Classifications
B; B60; B60W; B60W20/00; B60W20/10; B60W20/13; B60K; B60K6/00; B60K6/20; B60K6/42; B60K6/46; B60L; B60L15/00; B60L15/007; B60L50/00; B60L50/50; B60L50/60; B60L50/61; B60L50/62; B60W10/00; B60W10/04; B60W10/06; B60W10/08; B60W10/24; B60W10/26; B60L2200/00; B60L2200/26; B60L2220/00; B60L2220/10; B60L2220/14; B60W2510/00; B60W2510/24; B60W2510/242; B60W2510/244; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/62; Y02T10/64; Y02T10/70; Y02T10/7072
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2835859A
Cited
US3148320A
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US3329877A
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US3242408A
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US3227937A
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US3267288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |