Patent US2791179A successfully refreshed from Google Patents.
US2791179A
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Combined flow control and rephasing mechanism for fluid pumping units
Assignee: Worthington Corp
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Filing: 1953-09-29
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Granted: 1957-05-07
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Expires: 1973-09-29
Abstract
No abstract record available.
Inventors
- 👤 Oscar H Dorer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:22
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/007; F04B49/04; F04B49/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |