US2962002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage hydraulic servo valve
Assignee: Lockheed Martin Corp
•
Filing: 1956-04-10
•
Granted: 1960-11-29
•
Expires: 1976-04-10
Abstract
No abstract record available.
Inventors
- 👤 Paul F Hayner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:16
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0438; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2409; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB372258A
Cited
US1718673A
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DE525878C
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FR874370A
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US2615466A
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US2526709A
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US2520115A
Cited
US2601207A
Cited
US2767689A
Cited
US2738772A
Cited
US2797666A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-29 | 1964-05-30 | 1964-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-29 | 1968-05-30 | 1968-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-29 | 1972-05-30 | 1972-11-29 | $7700.00 | Window Closed / Lapsed |