US3426647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directional control valve
Assignee: Parker Hannifin Corp
•
Filing: 1966-04-14
•
Granted: 1969-02-11
•
Expires: 1986-04-14
Abstract
No abstract record available.
Inventors
- 👤 George J Martin
- 👤 Hugh J Stacey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:39
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/04; B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/20; B66F9/22; F16; F16K; F16K11/00; F16K11/02; F16K11/06; F16K11/065; F16K11/07; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3195559A
Cited
US3241461A
Cited
US3319653A
Cited
US3299903A
Cited
US3263574A
Cited
US3262467A
Cited
US3357451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |