US2827020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic valve positioning system with valve position feedback
Assignee: Schneider Electric Systems USA Inc
•
Filing: 1956-10-11
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Granted: 1958-03-18
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Expires: 1976-10-11
Abstract
No abstract record available.
Inventors
- 👤 Cook Lyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:57
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/126; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2322; Y10T137/2409
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US368089A
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US2104627A
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US2179450A
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US2269072A
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US2228015A
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US2588988A
Cited
FR1042859A
Cited
US2672150A
Cited
US2789543A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |