Patent US3558240A successfully refreshed from Google Patents.
US3558240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas operated deep well pump
Assignee: Orbit Flow Inc
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Filing: 1968-07-22
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Granted: 1971-01-26
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Expires: 1988-07-22
Abstract
Abstract DISCLOSED IS A GAS OPERATED INDUCTION PUMP FOR PUMPING LIQUIDS AND/OR SLURRIES FROM THE BOTTOM OF A WELL. AN ORIFICE IS POSITIONED ADJACENT THE BOTTOM OF THE WELL AND ENCLOSED BY A MIXING CHAMBER AND NOZZLE. INTRODUCTION OF A GAS INTO THE ORIFICE UNDER PRESSURE GREATER THAN THE HYDROSTATIC HEAD IN THE WELL CAUSES THE GAS TO PICK UP AND MIX WITH THE SURROUNDING LIQUID OR SLURRY TO GIVE "BODY" TO THE MIXTURE WHICH THEN PICKS UP MORE LIQUID OR SLURRY AT THE NOZZLE. THE DISCHARGE TUBE INCREASES IN SIZE TOWARD THE TOP OF THE WELL TO UTILIZE THE ENERGY OF THE EXPANDING GAS IN THE MIXTURE.
Inventors
- 👤 Lincoln Harry Snodgrass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:29
CPC Classifications
F; F04; F04B; F04B47/00; F04F; F04F5/00
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |