Patent US2589581A successfully refreshed from Google Patents.
US2589581A
Expired / Lapsed
US
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Vertical-horizontal ball check valve
Assignee: Individual
•
Filing: 1946-05-06
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Granted: 1952-03-18
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Expires: 1966-05-06
Abstract
No abstract record available.
Inventors
- 👤 Sokolik Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:59
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/04; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/791; Y10T137/7911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US187364A
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US708529A
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US960944A
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US1756976A
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US1652341A
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US1796455A
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US1892649A
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US1936975A
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US2091138A
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US2278715A
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US2354255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |