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Patent US2500750A successfully refreshed from Google Patents.
US2500750A
Expired / Lapsed
US
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Fluid control unit
Assignee: Dole Valve Co
•
Filing: 1944-01-13
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Granted: 1950-03-14
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Expires: 1964-01-13
Abstract
No abstract record available.
Inventors
- 👤 Donald H Halenza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:10
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; G05D7/0113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1165913A
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US1262225A
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US1714573A
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US1800352A
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GB372286A
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US2012162A
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US2062341A
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US2160757A
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US2318236A
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US2305151A
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US2319514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |