US3556679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pump
Assignee: ConocoPhillips Co
•
Filing: 1968-08-08
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Granted: 1971-01-19
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Expires: 1988-08-08
Abstract
Abstract RECIPROCATING PISTON PUMP ACTUATED BY A SCREW FEED AND HAVING READILY INTERCHANGEABLE PISTON AND CYLINDER ASSEMBLIES, IN ONE EMBODIMENT, A PISTON POSITION INDICATOR IS PROVIDED.
Inventors
- 👤 Paul L Middlebusher
- 👤 William R Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B49/00; F04B49/06; F04B7/00; F04B7/0076; F04B9/00; F04B9/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |