US2476516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pitch control mechanism for helicopter rotors
Assignee: THOMPSON WADE CORP
•
Filing: 1944-09-27
•
Granted: 1949-07-19
•
Expires: 1964-09-27
Abstract
No abstract record available.
Inventors
- 👤 Tom H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:56
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1096045A
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US1900689A
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US2380582A
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US2169849A
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US2193498A
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US2256918A
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US2256635A
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US2342672A
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US2376523A
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US2427981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |