US2960202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clutch mechanism for a helicopter
Assignee: Kaman Aircraft Corp
•
Filing: 1955-05-25
•
Granted: 1960-11-15
•
Expires: 1975-05-25
Abstract
No abstract record available.
Inventors
- 👤 Martin L Stevens
- 👤 Nelson R Richmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:56
CPC Classifications
B; B64; B64D; B64D35/00; F; F16; F16D; F16D41/00; F16D43/00; F16D43/28; F16D43/284
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1441589A
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US1722289A
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US2210416A
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US2440624A
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US2517955A
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US2587823A
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US2586220A
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US2646150A
Cited
US2664176A
Cited
US2715455A
Cited
GB707664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |