US3390615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic servo valve having uniform response to input signals independent of magnitude and direction of load
Assignee: Lockheed Martin Corp
•
Filing: 1967-05-26
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Granted: 1968-07-02
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Expires: 1987-05-26
Abstract
No abstract record available.
Inventors
- 👤 Paul F Hayner
- 👤 Bernier Gerald Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:35
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/16; F15B9/17; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; 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)
CA672800A
Cited
US2931389A
Cited
US2964059A
Cited
US3095906A
Cited
US3054388A
Cited
US3211063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |