Patent US3203358A successfully refreshed from Google Patents.
US3203358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid flow control apparatus
Assignee: Hughes Tool Co
•
Filing: 1962-08-13
•
Granted: 1965-08-31
•
Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Regan John
- 👤 Miller Leroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:09
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; Y; Y10; Y10T; Y10T137/00; Y10T137/7287; Y10T137/7339
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
IN AN APPARATUS FOR REMOVING WELL FLUID FROM A WELL INCLUDING SPACED, VERTICAL CASING AND TUBING WALLS FORMING A RESERVOIR TO RECEIVE WELL FLUID PREPARATORY TO INTRODUCTION INTO A WELL PUMP, THE PROVISION OF: VERTICAL PASSAGE MEANS INTERCONNECTING SAID RESERVOIR WITH WELL FLUID FROM SAID WELL, SAND PASSAGE MEANS EXTENDING UPWARDLY IN SAID RESERVOIR AT AN UPPER PORTION AND OPENING INTO SAID RESERVOIR AT AN UPPER PORTION THEREOF BELOW A NORMAL FLUID LEVEL; VALVE MEANS ASSOCIATED WITH SAID PASSAGE MEANS TO CONTROL FLOW OF FLUID INTO SAID RESERVOIR; AND PRESSURE SENSITIVE MEANS RESPONSIVE TO CHANGES IN FLUID LEVEL IN SAID RESERVOIR TO OPERATE SAID VALVE MEANS TO
Claim 2
Dependent Claim
107 words
IN AN APPARATUS FOR REMOVING WELL FLUID FROM A WELL INCLUDING SPACED, VERTICAL CASING AND TUBING WALLS FORMING A RESERVOIR TO RECEIVE WELL FLUID PREPARATORY TO INTRODUCTION INTO A WELL PUMP, THE PROVISION OF: VERTICAL PASSAGE MEANS INTERCONNECTING SAID RESERVOIR WITH WELL FLUID FROM SAID WELL, SAND PASSAGE MEANS EXTENDING UPWARDLY IN SAID RESERVOIR AT AN UPPER PORTION AND OPENING INTO SAID RESERVOIR AT AN UPPER PORTION THEREOF BELOW A NORMAL FLUID LEVEL; VALVE MEANS ASSOCIATED WITH SAID PASSAGE MEANS TO CONTROL FLOW OF FLUID INTO SAID RESERVOIR; AND PRESSURE SENSITIVE MEANS RESPONSIVE TO CHANGES IN FLUID LEVEL IN SAID RESERVOIR TO OPERATE SAID VALVE MEANS TO
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |