US3026892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrohydraulic servo valve
Assignee: Pneumo Dynamics Corp
•
Filing: 1957-06-26
•
Granted: 1962-03-27
•
Expires: 1977-06-26
Abstract
No abstract record available.
Inventors
- 👤 Vee C Tsien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:18
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; 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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US2139878A
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US2283753A
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US2388890A
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FR907650A
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US2591800A
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US2655940A
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US2709421A
Cited
US2767689A
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US2823689A
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US2835265A
Cited
US2849013A
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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) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |