US2476638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controllable pitch propeller
Assignee: Motors Liquidation Co
•
Filing: 1944-04-03
•
Granted: 1949-07-19
•
Expires: 1964-04-03
Abstract
No abstract record available.
Inventors
- 👤 Stuart Joseph
- 👤 Warren D Berkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:50
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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US1952800A
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US2237191A
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US2032255A
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US2160553A
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US2105843A
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US2186791A
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US2164489A
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US2342442A
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US2347962A
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US2427586A
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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) | 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 |