US3108764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forward thrust means for ducted rotor sustained aircraft
Assignee: Helipod Inc
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Filing: 1961-09-18
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Granted: 1963-10-29
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Expires: 1981-09-18
Abstract
No abstract record available.
Inventors
- 👤 Lyle K V Sudrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:19
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
74 words
THE COMBINATION OF AN AIRCRAFT HAVING A SUSTAINING ROTOR OPERATIVELY MOUNTED THEREON; A CIRCULAR DUCT SURROUNDING SAID ROTOR AND ENCLOSING THE AIRFLOW THROUGH THE ROTOR; A CIRCUMFERENTIALLY EXTENDING AIR INLET SLOT IN THE FORWARD PORTION OF SAID DUCT; SAID SLOT EXTENDING DOWNWARDLY AND INWARDLY AND OPENING INTO SAID DUCT WITHIN THE AXIAL CONFINES OF THE SWEPT VOLUME OF SAID ROTOR; AND SHUTTER MEANS OPERATIVELY MOUNTED IN SAID INLET SLOT TO CONTROL THE OPENING THEREOF.
References Cited (Backward Citations)
US2568812A
Cited
FR1240234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-28 | 1967-04-29 | 1967-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-28 | 1971-04-29 | 1971-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-28 | 1975-04-29 | 1975-10-29 | $7700.00 | Window Closed / Lapsed |