Patent US3104853A successfully refreshed from Google Patents.
US3104853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vertical take off and landing aircraft
Assignee: —
•
Filing: —
•
Granted: 1963-09-24
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Expires: 1980-09-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:10
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C39/062; B64C39/064; B64C29/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A VERTICAL TAKE OFF AND LANDING AIRCRAFT COMPRISING AN ANNULAR AIRFOIL, LANDING GEAR ATTACHED TO THE AIRFOIL FOR SUPPORTING THE AIRCRAFT IN AXIALLY UPRIGHT POSITION WHILE ON THE GROUND, A CENTRIFUGAL IMPELLER OF A SIZE TO FIT ROTATABLY WITHIN THE AIRFOIL, THE IMPELLER COMPRISING A THIN, SHEET-LIKE DISK HAVING A CENTRAL OPENING THEREIN, AND A PLURALITY OF RADIAL DISCHARGE IMPELLER BLADES SECURED TO THE DISK WITH A PORTION OF EACH BLADE ABOVE, AND A PORTION THEREOF BELOW SAID DISK, POWER DRIVE MEANS SUPPORTING THE IMPELLER FOR POWER DRIVEN ROTATION COAXIALLY WITHIN THE AIRFOIL, AND WITH THE PERIPHERAL PORTION OF THE IMPELLER DISK ALIGNED SUBSTANTIALLY WITH A CHORD OF THE AIRFOIL, WHEREBY THE AIR STREAM DISCHARGED BY ROTATION OF THE IMPELLER FLOWS BOTH OVER AND UNDER THE AIR-
Claim 2
Dependent Claim
127 words
A VERTICAL TAKE OFF AND LANDING AIRCRAFT COMPRISING AN ANNULAR AIRFOIL, LANDING GEAR ATTACHED TO THE AIRFOIL FOR SUPPORTING THE AIRCRAFT IN AXIALLY UPRIGHT POSITION WHILE ON THE GROUND, A CENTRIFUGAL IMPELLER OF A SIZE TO FIT ROTATABLY WITHIN THE AIRFOIL, THE IMPELLER COMPRISING A THIN, SHEET-LIKE DISK HAVING A CENTRAL OPENING THEREIN, AND A PLURALITY OF RADIAL DISCHARGE IMPELLER BLADES SECURED TO THE DISK WITH A PORTION OF EACH BLADE ABOVE, AND A PORTION THEREOF BELOW SAID DISK, POWER DRIVE MEANS SUPPORTING THE IMPELLER FOR POWER DRIVEN ROTATION COAXIALLY WITHIN THE AIRFOIL, AND WITH THE PERIPHERAL PORTION OF THE IMPELLER DISK ALIGNED SUBSTANTIALLY WITH A CHORD OF THE AIRFOIL, WHEREBY THE AIR STREAM DISCHARGED BY ROTATION OF THE IMPELLER FLOWS BOTH OVER AND UNDER THE AIR-
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) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |