Patent US2428150A successfully refreshed from Google Patents.
US2428150A
Expired / Lapsed
US
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Automatic shutoff valve for hydraulic transmission systems
Assignee: Individual
•
Filing: 1943-03-05
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Granted: 1947-09-30
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Expires: 1963-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jr Howard Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/20; F16K17/22; F16K17/24; F16K17/28; F16K17/30; F15; F15B; F15B20/00; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2514; Y10T137/2521; Y10T137/2544; Y10T137/2554; Y10T137/7722; Y10T137/7781; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86622; Y10T137/8663
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US881848A
Cited
US1045693A
Cited
US1775856A
Cited
US2263470A
Cited
US2286880A
Cited
US2333100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |