US3504252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speed-controlled d.c. motor having a mechanical or electrical commutator
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1967-06-05
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Granted: 1970-03-31
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Expires: 1987-06-05
Abstract
No abstract record available.
Inventors
- 👤 Helmut Moczala
- 👤 Willi Otzipka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:00
CPC Classifications
H; H02; H02K; H02K23/00; H02K23/62; H02K29/00; H02K29/06; H02K29/08; H02P; H02P6/00; H02P6/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3264539A
Cited
US3242406A
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US3274471A
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US3329852A
Cited
US3304481A
Cited
US3368128A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-30 | 1973-09-29 | 1974-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-30 | 1977-09-29 | 1978-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-30 | 1981-09-29 | 1982-03-31 | $7700.00 | Window Closed / Lapsed |