US3475000A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic actuators and control systems therefor
Assignee: Rotork PLC
•
Filing: 1966-10-31
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Granted: 1969-10-28
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Expires: 1986-10-31
Abstract
No abstract record available.
Inventors
- 👤 Jeremy J Fry
- 👤 Donald L Hore
- 👤 Peter T M Nott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:51
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/16; F15; F15B; F15B11/00; F15B11/02; F15B11/04; F15B11/046; F15B11/048; F16K47/00; F15B2211/00; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/30525; F15B2211/31; F15B2211/3144; F15B2211/32; F15B2211/321; F15B2211/322; F15B2211/324; F15B2211/329; F15B2211/35; F15B2211/60; F15B2211/635; F15B2211/6355; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7053; F15B2211/75; F15B2211/755
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) | 1972-10-27 | 1973-04-28 | 1973-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-27 | 1977-04-28 | 1977-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-27 | 1981-04-28 | 1981-10-28 | $7700.00 | Window Closed / Lapsed |