Patent US3544138A successfully refreshed from Google Patents.
Patent US3528446A successfully refreshed from Google Patents.
US3528446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Servo valve with resiliently mounted jet pipe
Assignee: Vickers Inc
•
Filing: 1968-02-27
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Granted: 1970-09-15
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Expires: 1988-02-27
Abstract
No abstract record available.
Inventors
- 👤 Paul E Horn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:00
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; F15B13/042; F15B13/043; F15B13/0436; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86606; Y10T137/86614
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US627671A
Cited
US2255322A
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US2417108A
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US2742919A
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US3017864A
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US3303852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |