Patent US2520216A successfully refreshed from Google Patents.
US2520216A
Expired / Lapsed
US
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Snap action suction valve
Assignee: Alco Valve Co
•
Filing: 1945-09-17
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Granted: 1950-08-29
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Expires: 1965-09-17
Abstract
No abstract record available.
Inventors
- 👤 Edward F Kounovsky
- 👤 John E Dube
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:15
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/12; G05D23/125; G05D23/126; G05D23/127; G05D23/128; F; F25; F25B; F25B41/00; F25B41/20
Claims Analysis
Total Claims: 0
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US2264261A
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FR833361A
Cited
US2321743A
Cited
US2416875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |