Patent US2150913A successfully refreshed from Google Patents.
US3378740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-current motor control circuit employing a parallel damping member
Assignee: US Philips Corp
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Filing: 1964-04-27
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Granted: 1968-04-16
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Expires: 1984-04-27
Abstract
No abstract record available.
Inventors
- 👤 Cruel Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/14; G; G05; G05D; G05D3/00; G05D3/10; G05D3/12; G05D3/14; G05D3/1409; H02; H02P; H02P7/00; H02P7/03; H02P7/05; H03J1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-16 | 1971-10-16 | 1972-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-16 | 1975-10-16 | 1976-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-16 | 1979-10-16 | 1980-04-16 | $7700.00 | Window Closed / Lapsed |