US3081963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter with central airfoil
Assignee: Individual
•
Filing: 1959-07-13
•
Granted: 1963-03-19
•
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 13:16
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
References Cited (Backward Citations)
US1572767A
Cited
US1560860A
Cited
US2008424A
Cited
US2389798A
Cited
US2599690A
Cited
US2711295A
Cited
US2738146A
Cited
US2912191A
Cited
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 |