US3012576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control valves with spool check and spool alignment devices
Assignee: Commercial Shearing Inc
•
Filing: 1959-02-24
•
Granted: 1961-12-12
•
Expires: 1979-02-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:38
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; F15B13/06; F15B13/08; F16; F16K; F16K27/00; F16K27/04; F16K27/041; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87169; Y10T137/87177; Y10T137/87185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286020A
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US2448532A
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US2448557A
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US2501328A
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US2634751A
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US2651324A
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US2699756A
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US2912007A
Cited
US2767689A
Cited
US2823647A
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US2852039A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |