Patent US3144908A successfully refreshed from Google Patents.
US3144908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective second harmonic control
Assignee: Bell Aerospace Corp
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Filing: 1962-12-28
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Granted: 1964-08-18
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Expires: 1982-12-28
Abstract
No abstract record available.
Inventors
- 👤 Robert L Pascher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:54
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
APPARATUS FOR DEVELOPING SECOND HARMONIC CYCLIC PITCH CONTROL IN A ROTARY-WING AIRCRAFT, COMPRISING: A MAST, A ROTOR CONNECTED TO SAID MAST, A FIRST HARMONIC SWASHPLATE, A SECOND HARMONIC SWASHPLATE, SAID FIRST AND SECOND HARMONIC SWASHPLATES MOUNTED ADJACENT SAID MAST,
Claim 2
Dependent Claim
39 words
APPARATUS FOR DEVELOPING SECOND HARMONIC CYCLIC PITCH CONTROL IN A ROTARY-WING AIRCRAFT, COMPRISING: A MAST, A ROTOR CONNECTED TO SAID MAST, A FIRST HARMONIC SWASHPLATE, A SECOND HARMONIC SWASHPLATE, SAID FIRST AND SECOND HARMONIC SWASHPLATES MOUNTED ADJACENT SAID MAST,
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Cited
FR1213762A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |