US2658576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade pitch control mechanism
Assignee: Boeing Helicopters Co
•
Filing: 1951-03-08
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Granted: 1953-11-10
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Expires: 1971-03-08
Abstract
No abstract record available.
Inventors
- 👤 Vytautas S Mosinskis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:05
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473; B64C27/50; B64C27/54
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759442A
Cited
US1989544A
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US2397154A
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US2410459A
Cited
US2428200A
Cited
US2540473A
Cited
US2373575A
Cited
US2430767A
Cited
US2537623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |