US3476997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless d.c. motor control
Assignee: Licentia Patent Verwaltungs GmbH
•
Filing: 1967-02-27
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Granted: 1969-11-04
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Expires: 1987-02-27
Abstract
No abstract record available.
Inventors
- 👤 Willi Otzipka
- 👤 Joachim Mally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:02
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/08; H02K; H02K29/00; H02K29/06; H02K29/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3035183A
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US3200316A
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US3185910A
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US3305717A
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US3375422A
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US3293541A
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US3383574A
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DE1206080B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-03 | 1973-05-05 | 1973-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-03 | 1977-05-05 | 1977-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-03 | 1981-05-05 | 1981-11-04 | $7700.00 | Window Closed / Lapsed |