Patent US2654434A successfully refreshed from Google Patents.
Patent US2570937A successfully refreshed from Google Patents.
US2570937A
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Valve for fluid-pressure systems
Assignee: William Coulthard & Co Lt
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Filing: 1949-02-23
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Granted: 1951-10-09
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Gash Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:31
CPC Classifications
F; F15; F15B; F15B13/00; F15B13/02; B; B22; B22D; B22D17/00; B22D17/20; B22D17/32; F16; F16K; F16K15/00; F16K15/02; F16K15/04; F16K15/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7771; Y10T137/7779
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US479309A
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US2207681A
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US726841A
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US1583834A
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US1923127A
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US2210555A
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US2171628A
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US2271031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |