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Patent US2621873A successfully refreshed from Google Patents.
US2621873A
Expired / Lapsed
US
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Aircraft control
Assignee: North American Aviation Corp
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Filing: 1947-03-31
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Granted: 1952-12-16
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Expires: 1967-03-31
Abstract
No abstract record available.
Inventors
- 👤 Carroll G Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:48
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/04; G05D1/042; G05D1/046; B; B64; B64D; B64D45/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1763590A
Cited
US1885578A
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US1956755A
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US1935824A
Cited
US1862902A
Cited
GB402225A
Cited
US2262968A
Cited
US2398421A
Cited
US2343288A
Cited
US2428194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-16 | 1956-06-16 | 1956-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-16 | 1960-06-16 | 1960-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-16 | 1964-06-16 | 1964-12-16 | $7700.00 | Window Closed / Lapsed |