US3364864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pumping device for deep oil wells
Assignee: Individual
•
Filing: 1965-03-17
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Granted: 1968-01-23
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Expires: 1985-03-17
Abstract
No abstract record available.
Inventors
- 👤 Gheorghe Petrescu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
H; H02; H02K; H02K41/00; H02K41/02; H02K41/025; E; E21; E21B; E21B43/00; E21B43/12; F; F04; F04B; F04B1/00; F04B1/02; F04B17/00; F04B17/03; F04B17/04; F04B17/046; F04B47/00; F04B47/06; F04B47/12; F04B53/00; F04B53/14; F04B7/00; F04B7/0076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A PUMPING SYSTEM ADAPTED TO BE MOUNTED IN THE CASING OF WELLS, COMPRISING IN COMBINATION, AND ELECTRIC INDUCTION MOTOR, HAVING AN AXIALLY RECIPROCALLY MOVING ARMATURE OPERATIVELY MOUNTING IN SAID MOTOR; A DOUBLEPUMPING MEANS RECIPROCALLY MOUNTING IN SAID CASING, AND COAXIALLY CONNECTED TO SAID ARMATURE OF SAID ELECTRIC MOTOR; SAID DOUBLE-PUMPING MEANS INCLUDE MEANS FOR DISCHARGING LIQUID VIA SAID CASING AND ALSO INCLUDE MEANS FOR EXERTING ON SAID ARMATURE PRESSURE PRODUCED BY THE COLUMN OF DISCHARGING LIQUID IMMEDIATELY AFTER REVERSAL OF MOTION OF SAID ARMATURE, IN THE DIRECTION OF MOVEMENT THEREOF; AND AN ELECTRIC POWER SOURCE OPERATIVELY CONNECTED TO SAID ELECTRIC MOTOR.
Claim 2
Dependent Claim
101 words
A PUMPING SYSTEM ADAPTED TO BE MOUNTED IN THE CASING OF WELLS, COMPRISING IN COMBINATION, AND ELECTRIC INDUCTION MOTOR, HAVING AN AXIALLY RECIPROCALLY MOVING ARMATURE OPERATIVELY MOUNTING IN SAID MOTOR; A DOUBLEPUMPING MEANS RECIPROCALLY MOUNTING IN SAID CASING, AND COAXIALLY CONNECTED TO SAID ARMATURE OF SAID ELECTRIC MOTOR; SAID DOUBLE-PUMPING MEANS INCLUDE MEANS FOR DISCHARGING LIQUID VIA SAID CASING AND ALSO INCLUDE MEANS FOR EXERTING ON SAID ARMATURE PRESSURE PRODUCED BY THE COLUMN OF DISCHARGING LIQUID IMMEDIATELY AFTER REVERSAL OF MOTION OF SAID ARMATURE, IN THE DIRECTION OF MOVEMENT THEREOF; AND AN ELECTRIC POWER SOURCE OPERATIVELY CONNECTED TO SAID ELECTRIC MOTOR.
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) | 1971-01-22 | 1971-07-24 | 1972-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-22 | 1975-07-24 | 1976-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-22 | 1979-07-24 | 1980-01-23 | $7700.00 | Window Closed / Lapsed |