Patent US2761519A successfully refreshed from Google Patents.
US2761519A
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US
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Propeller variable pitch change mechanism
Assignee: Motors Liquidation Co
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Filing: 1952-05-21
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Granted: 1956-09-04
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Expires: 1972-05-21
Abstract
No abstract record available.
Inventors
- 👤 Richard A Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:30
CPC Classifications
B; B63; B63H; B63H3/00; B63H3/06; B63H3/08; B63H2003/088; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19874
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1432494A
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US1578882A
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US1891545A
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US2352140A
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US2469106A
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US2511393A
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US2640555A
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US2600017A
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US2507671A
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US2615432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |