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Patent US2512052A successfully refreshed from Google Patents.
US2512052A
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Drain valve
Assignee: Dole Valve Co
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Filing: 1945-05-10
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Granted: 1950-06-20
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Expires: 1965-05-10
Abstract
No abstract record available.
Inventors
- 👤 Clyde A Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:49
CPC Classifications
F; F16; F16L; F16L29/00; F16L29/007; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2014; F16K1/2028; F16K1/2042; F16K1/205; F16K1/2078; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7898; Y10T137/7901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US923808A
Cited
US1020022A
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US1733672A
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US2246802A
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US2268806A
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US2312290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-19 | 1953-12-19 | 1954-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-19 | 1957-12-19 | 1958-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-19 | 1961-12-19 | 1962-06-20 | $7700.00 | Window Closed / Lapsed |