Patent US2680952A successfully refreshed from Google Patents.
US2680952A
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Electrically powered hydraulic linear wingfold actuator
Assignee: McDonnell Aircraft Corp
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Filing: 1949-11-21
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Granted: 1954-06-15
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Expires: 1969-11-21
Abstract
No abstract record available.
Inventors
- 👤 Charles H Hurkamp
- 👤 Ralph B Tilney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:52
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/02; B64C25/08; B64C25/10; B64C25/18; B64C25/22; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US577489A
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US1725489A
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US1861116A
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US2223792A
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US2467509A
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US2457467A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-14 | 1957-12-14 | 1958-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-14 | 1961-12-14 | 1962-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-14 | 1965-12-14 | 1966-06-15 | $7700.00 | Window Closed / Lapsed |