US3321156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universally maneuverable aircraft
Assignee: Individual
•
Filing: 1965-03-18
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Granted: 1967-05-23
•
Expires: 1985-03-18
Abstract
No abstract record available.
Inventors
- 👤 Douglas Q Mcmasters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:15
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/20; B64C39/00; B64C39/001
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN AN AIRCRAFT, THE COMBINATION OF; A COMPARTMENT, A POWER-DRIVEN FAN ROTATABLY MOUNTED IN THE COMPARTMENT FOR DRAWING AIR FROM ABOVE THE COMPARTMENT, AND FORCING AIR OUT THE BOTTOM OF THE COMPARTMENT TO PRODUCE AN UPWARD THRUST ON THE AIRCRAFT, MEANS FOR SELECTIVELY CAUSING TILTING OF SAID COMPARTMENT, AN INFLATED ENVELOPE MOUNTED ON SAID COMPARTMENT AND ENCIRCLING SAID COMPARTMENT IN THE HORIZONTAL PLANE, SAID ENVELOPE HAVING A RELATIVELY FLAT CIRCULAR SHAPE WITH SAID COMPARTMENT AT THE CENTER AND TAPERING UPPER AND LOWER SURFACES CONVERGING OUTWARDLY INTO A BLUNTLY ROUNDED CIRCULAR PERIPHERY, AND A GAS OF LESS DENSITY THAN AIR FILLING SAID ENVELOPE FOR BUOYANTLY SUPPORTING A PORTION OF THE AIRCRAFT WEIGHT.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |