US2498110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-position variable pitch propeller
Assignee: CANADIAN CAR AND FOUNDRY Co Ltd
•
Filing: 1945-03-10
•
Granted: 1950-02-21
•
Expires: 1965-03-10
Abstract
No abstract record available.
Inventors
- 👤 Charles I Lathrem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:02
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/30; B64C11/32; B64C11/34; B64C11/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1833843A
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GB346844A
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US2032254A
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US2032255A
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FR782129A
Cited
DE635992C
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US2229058A
Cited
US2233468A
Cited
US2274334A
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US2276347A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |