Patent US2425886A successfully refreshed from Google Patents.
US2425886A
Expired / Lapsed
US
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Launching and landing of land-based airplanes
Assignee: Individual
•
Filing: 1945-02-26
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Granted: 1947-08-19
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Expires: 1965-02-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel S Knox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:31
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/04; B64F1/22; B64F1/223; B64F1/225; B64F1/227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE374902C
Cited
US1720928A
Cited
FR712060A
Cited
US2007910A
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US2243538A
Cited
US2331416A
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US2358426A
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US2370012A
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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) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |