US3185408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft propulsion system
Assignee: Boeing Co
•
Filing: 1963-07-17
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Granted: 1965-05-25
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Expires: 1983-07-17
Abstract
No abstract record available.
Inventors
- 👤 Harry C Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:20
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0016; B64C29/0033
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
IN AN AIRPLANE HAVING WING MEANS WITH PRIMARY PROPULSION MEANS CARRIED THEREBY, SECONDARY PROPULSION MEANS HAVING ROTOR MEANS PIVOTALLY CONNECTED TO SAID PRIMARY PROPULSION MEANS FOR BEING PIVOTED THROUGH NINETY DEGREES TO AND FROM A VERTICAL FIGHT MODE AND AN HORIZONTAL FLIGHT MODE, MEANS FOR CONTROLLING THE ANGULAR POSITION OF SAID SECONDARY PROPULSION MEANS, BLADE PITCH CONTROL MEANS FOR CONTROLLING THE BLADE PITCH OF SAID ROTOR MEANS, MEANS FOR FOLDING THE BLADES OF SAID ROTOR MEANS AND THEREBY RETRACTING THE SAME FOR PRESENTING MINIMUM DRAG IN THE HORIZONTAL FLIGHT MODE, AND MEANS FOR CONTROLLING THE FOLDING AND RETRACTING OF SAID BLADES OF SAID ROTOR MEANS.
References Cited (Backward Citations)
US286969A
Cited
US2219980A
Cited
US2478847A
Cited
FR1005200A
Cited
US2510216A
Cited
US3089666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-24 | 1968-11-23 | 1969-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-24 | 1972-11-23 | 1973-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-24 | 1976-11-23 | 1977-05-25 | $7700.00 | Window Closed / Lapsed |