Patent US2987048A successfully refreshed from Google Patents.
US2987048A
Expired / Lapsed
US
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Parallel drive actuator for flight control systems
Assignee: North American Aviation Corp
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Filing: 1959-10-20
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Granted: 1961-06-06
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Expires: 1979-10-20
Abstract
No abstract record available.
Inventors
- 👤 Elliott R Buxton
- 👤 Greenleaf W Sargent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:58
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/1409; B; B64; B64C; B64C13/00; B64C13/24; F15B9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2352140A
Cited
US2380510A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |