Patent US2500692A successfully refreshed from Google Patents.
US2500692A
Expired / Lapsed
US
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Pitch shiftable propeller blade and torque unit therefor
Assignee: Motors Liquidation Co
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Filing: 1944-10-07
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Granted: 1950-03-14
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Expires: 1964-10-07
Abstract
No abstract record available.
Inventors
- 👤 Thomas B Martin
- 👤 Kenneth L Berninger
- 👤 John F Haines
- 👤 James R May
- 👤 Phillip E Theobald
- 👤 Garthwood R Taylor
- 👤 Gene T Neudeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:54
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/02; B64C11/04; B64C11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2147078A
Cited
US2307101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |