Patent US3009447A successfully refreshed from Google Patents.
US3009447A
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Pressure and velocity feedback servo valve
Assignee: Westinghouse Electric Corp
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Filing: 1959-06-19
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Granted: 1961-11-21
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Expires: 1979-06-19
Abstract
No abstract record available.
Inventors
- 👤 Wayne B Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:15
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/02; F15B9/08; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
US1918424A
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GB570487A
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US2478183A
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US2616397A
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US2637303A
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US2623504A
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US2623503A
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US2889815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |