US2541636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propeller pitch changing mechanism
Assignee: Curtiss Wright Corp
•
Filing: 1946-04-12
•
Granted: 1951-02-13
•
Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Charles W Chillson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:48
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/38; B64C11/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2138339A
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US2138487A
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US2236841A
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US2314025A
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US2248789A
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US2376673A
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US2404703A
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US2423400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |