Patent US2985409A successfully refreshed from Google Patents.
US2985409A
Expired / Lapsed
US
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Gust alleviation system
Assignee: North American Aviation Corp
•
Filing: 1955-09-26
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Granted: 1961-05-23
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Expires: 1975-09-26
Abstract
No abstract record available.
Inventors
- 👤 John L Atwood
- 👤 Jr Robert H Cannon
- 👤 Jr John M Johnson
- 👤 Gustav M Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:52
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/06; G05D1/0607; G05D1/0615; G05D1/0623
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |