US2866608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical-take-off type aircraft with jet driven rotor system
Assignee: Individual
•
Filing: 1955-05-18
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Granted: 1958-12-30
•
Expires: 1975-05-18
Abstract
No abstract record available.
Inventors
- 👤 Lloyd H Leonard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:18
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/02; B64C29/0008; B64C29/0041; B64C29/0075
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2330056A
Cited
US2540991A
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US2422744A
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US2485502A
Cited
US2568812A
Cited
US2684213A
Cited
FR1006380A
Cited
FR971767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |