US2481379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft having extensible landing gear positionable for horizontal and vertical take-off
Assignee: Individual
•
Filing: 1945-07-26
•
Granted: 1949-09-06
•
Expires: 1965-07-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Zimmerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:21
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0091
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR767748A
Cited
US1485780A
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US1608763A
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US1786545A
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US1853232A
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GB438296A
Cited
US2106289A
Cited
GB468063A
Cited
GB505263A
Cited
US2360988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |