US2884581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor control system
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1953-10-15
•
Granted: 1959-04-28
•
Expires: 1973-10-15
Abstract
No abstract record available.
Inventors
- 👤 Carl F Schunemann
- 👤 George E Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:17
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/02; H01H19/10; H01H19/11; G; G05; G05D; G05D3/00; G05D3/12; G05D3/125; G05D3/127; H01P; H01P1/00; H01P1/10; H01P1/12; H01P1/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1121986A
Cited
US2108607A
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US2085442A
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US2137721A
Cited
US2267135A
Cited
US2321556A
Cited
US2475271A
Cited
US2493844A
Cited
US2474576A
Cited
FR941271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |