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US2717653A
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Oscillation limiting mechanism for a helicopter rotor
Assignee: Kaman Aircraft Corp
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Filing: 1951-03-10
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Granted: 1955-09-13
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Expires: 1971-03-10
Abstract
No abstract record available.
Inventors
- 👤 John O Emmerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:03
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/322
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL64262C
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US2151215A
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US2396038A
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US2471681A
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US2475333A
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US2465674A
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US2481747A
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US2614640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-12 | 1959-03-14 | 1959-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-12 | 1963-03-14 | 1963-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-12 | 1967-03-14 | 1967-09-13 | $7700.00 | Window Closed / Lapsed |