US3387628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide valves
Assignee: Dowty Hydraulic Units Ltd
•
Filing: 1965-11-19
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Granted: 1968-06-11
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Expires: 1985-11-19
Abstract
No abstract record available.
Inventors
- 👤 John C E Flint
- 👤 Spence Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:38
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/04; F16K3/06; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/0655; F16K11/10; F16K11/20; F16K11/22; Y; Y10; Y10T; Y10T137/00; Y10T137/5109; Y10T137/5283; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/87169; Y10T137/87177; Y10T137/87233
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-11 | 1971-12-11 | 1972-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-11 | 1975-12-11 | 1976-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-11 | 1979-12-11 | 1980-06-11 | $7700.00 | Window Closed / Lapsed |