Patent US2424889A successfully refreshed from Google Patents.
US2424889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airplane control system
Assignee: Individual
•
Filing: 1943-08-20
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Granted: 1947-07-29
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Expires: 1963-08-20
Abstract
No abstract record available.
Inventors
- 👤 Tracy S Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:17
CPC Classifications
B; B64; B64C; B64C13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1190374A
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FR444449A
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US1350938A
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US1404129A
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US1396459A
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US1720661A
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US1836681A
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US1900068A
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GB448827A
Cited
GB465627A
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US2110516A
Cited
GB524865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |