Patent US3081963A successfully refreshed from Google Patents.
US3081963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter with central airfoil
Assignee: Individual
•
Filing: 1959-07-13
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Granted: 1963-03-19
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Expires: 1979-07-13
Abstract
No abstract record available.
Inventors
- 👤 Thal Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:32
CPC Classifications
B; B64; B64C; B64C27/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A HELICOPTER VEHICLE HAVING A PROPULSION UNIT FOR BOTH VERTICAL AND HORIZONTAL FLIGHT COMPRISING A FUSELAGE, LIFTING HELICOPTER-TYPE PROPELLER BLADE MEANS CONSTITUTING A MAIN THRUST MEANS FOR SAID VEHICLE SUPPORTED FROM SAID FUSELAGE AND EXTENDING IN A GENERALLY HORIZONTAL DIRECTION, AND A NON-ROTATABLE GENERALLY HORIZONTAL AIRFOIL SURFACE MOUNTED DIRECTLY ABOVE SAID PROPELLER BLADE MEANS AND ALSO SUPPORTED FROM SAID FUSELAGE, SAID SURFACE BEING OF SMALLER MAXIMUM EXTENT THAN THE RADIAL
Claim 2
Dependent Claim
70 words
A HELICOPTER VEHICLE HAVING A PROPULSION UNIT FOR BOTH VERTICAL AND HORIZONTAL FLIGHT COMPRISING A FUSELAGE, LIFTING HELICOPTER-TYPE PROPELLER BLADE MEANS CONSTITUTING A MAIN THRUST MEANS FOR SAID VEHICLE SUPPORTED FROM SAID FUSELAGE AND EXTENDING IN A GENERALLY HORIZONTAL DIRECTION, AND A NON-ROTATABLE GENERALLY HORIZONTAL AIRFOIL SURFACE MOUNTED DIRECTLY ABOVE SAID PROPELLER BLADE MEANS AND ALSO SUPPORTED FROM SAID FUSELAGE, SAID SURFACE BEING OF SMALLER MAXIMUM EXTENT THAN THE RADIAL
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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) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |