US2620150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane control
Assignee: North American Aviation Corp
•
Filing: 1946-04-22
•
Granted: 1952-12-02
•
Expires: 1966-04-22
Abstract
No abstract record available.
Inventors
- 👤 John L Atwood
- 👤 Henrichsen Knut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:06
CPC Classifications
B; B64; B64C; B64C17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2014965A
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US1119324A
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US1840683A
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US1935824A
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US2041475A
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US2106684A
Cited
US2156994A
Cited
US2159610A
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US2428194A
Cited
US2419298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |