Patent US2853976A successfully refreshed from Google Patents.
US2853976A
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US
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Four way, solenoid actuated, fluid operated valve
Assignee: Weston Hydraulics Ltd
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Filing: 1954-11-08
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Granted: 1958-09-30
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Expires: 1974-11-08
Abstract
No abstract record available.
Inventors
- 👤 Harvey F Gerwig
- 👤 Robert M Cox
- 👤 Fred O Hosterman
- 👤 Robert V Hollingsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:46
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/42; F16K31/423; F16K31/426; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/86614; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1946348A
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US2340817A
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US2363111A
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US2409517A
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US2537391A
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US2591800A
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US2641229A
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US2601990A
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US2700986A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |