Patent US5710744A successfully refreshed from Google Patents.
US2983281A
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Check valve for a heavy duty pump
Assignee: Halliburton Co
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Filing: 1958-02-03
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Granted: 1961-05-09
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Frank A Bynum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:42
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/10; F04B53/1087; F04B53/102; F04B53/1022; F04B53/1025; F16; F16K; F16K15/00; F16K15/02; F16K15/06; F16K15/063; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7922; Y10T137/7929; Y10T137/7939
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2179165A
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US2233649A
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US2413869A
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US2263750A
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US2666614A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |