US3556691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pump having a piston with a combined rotary and reciprocating action
Assignee: Individual
•
Filing: 1969-08-04
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Granted: 1971-01-19
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Expires: 1989-08-04
Abstract
Abstract A PUMP HAVING A ROTARY AND RECIPROCATING PISTON. THE PISTON BEING PROVIDED WITH A PART OR PARTS ADAPTED TO COOPERATE ALTERNATELY WITH THE SUCTION AND DELIVERY PARTS IN THE PUMP CASING. THE ENDS OF THE SUCTION AND DELIVERY PARTS WITHIN THE PUMP CASING ARE SHAPED TO FIT THE PERIPHERY OF THE PISTON CLOSELY, AND URGED AGAINST THE SAME BY SPRINGS.
Inventors
- 👤 Albert Friedrich Buri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:42
CPC Classifications
F; F04; F04B; F04B53/00; F04B53/14; F04B7/00; F04B7/04; F04B7/06
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 |