Patent US2641437A successfully refreshed from Google Patents.
US2641437A
Expired / Lapsed
US
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Check valve with supplemental cam actuator
Assignee: Individual
•
Filing: 1948-05-03
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Granted: 1953-06-09
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Expires: 1968-05-03
Abstract
No abstract record available.
Inventors
- 👤 Jay Carl
- 👤 Jay Bernard
- 👤 Jay Jules
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:05
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/18; F16K15/184; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7876; Y10T137/7877; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1740420A
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US868371A
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US1354440A
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US1584587A
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US1834276A
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US1872632A
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US2052827A
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US2129986A
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US2138125A
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US2420588A
Cited
US2441253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |