Patent US3312425A successfully refreshed from Google Patents.
US3312425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: Individual
•
Filing: 1965-10-12
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Granted: 1967-04-04
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence D Lennon
- 👤 Robert G Varner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:17
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0025; B64C39/00; B64C39/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN AIRCRAFT COMPRISING A CIRCULAR BASE, A CONTROL STATION MOUNTED ON SAID BASE, AN IMPELLER ASSEMBLY ROTATABLY MOUNTED ON SAID BASE, FOR ROTATION ABOUT SAID CONTROL STATION, A LIFT-PRODUCING AIR-FOIL CIRCUMFERENTIALLY POSITIONED AROUND SAID IMPELLER ASSEMBLY, SAID AIRFOIL BEING PROVIDED WITH AN AIR INTAKE SLOT INBOARD THEREOF, ADJACENT THE OUTER EXTREMITY OF SAID IMPELLER ASSEMBLY, A HORIZONTAL THRUST ORIFICE IN THE OUTER PERIPHERY OF SAID AIRFOIL, A VERTICAL THRUST ORIFICE IN THE LOWER PORTION OF SAID AIRFOIL, MEANS FOR SELECTIVELY DIRECTING AIR TO THE
Claim 2
Dependent Claim
84 words
AN AIRCRAFT COMPRISING A CIRCULAR BASE, A CONTROL STATION MOUNTED ON SAID BASE, AN IMPELLER ASSEMBLY ROTATABLY MOUNTED ON SAID BASE, FOR ROTATION ABOUT SAID CONTROL STATION, A LIFT-PRODUCING AIR-FOIL CIRCUMFERENTIALLY POSITIONED AROUND SAID IMPELLER ASSEMBLY, SAID AIRFOIL BEING PROVIDED WITH AN AIR INTAKE SLOT INBOARD THEREOF, ADJACENT THE OUTER EXTREMITY OF SAID IMPELLER ASSEMBLY, A HORIZONTAL THRUST ORIFICE IN THE OUTER PERIPHERY OF SAID AIRFOIL, A VERTICAL THRUST ORIFICE IN THE LOWER PORTION OF SAID AIRFOIL, MEANS FOR SELECTIVELY DIRECTING AIR TO THE
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |