US3218985A
Expired / Lapsed
US
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Flow control method and apparatus
Assignee: Merla Tool Corp
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Filing: 1963-09-03
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Granted: 1965-11-23
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Expires: 1983-09-03
Abstract
No abstract record available.
Inventors
- 👤 Robert O Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:35
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; E21B23/00; E21B23/02; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
THE COMBINATION WITH WELL PRODUCTION TUBING HAVING PORTS THROUGH THE WALL THEREOF AT INTERVALS THEREALONG OF A VALVE CONTROLLING EACH OF SAID PORTS AND A VALVE ACTUATOR DEVICE RECEIVED IN SAID TUBING AND NORMALLY MOVABLE THEREALONG PAST SAID VALVES, SAID DEVICE INCLUDING MECHANISM FOR ENGAGING AND OPENING SAID VALVES SELECTIVELY DURING MOVEMENT ALONG SAID TUBING AND MEANS OPERATIVE-
Claim 2
Dependent Claim
58 words
THE COMBINATION WITH WELL PRODUCTION TUBING HAVING PORTS THROUGH THE WALL THEREOF AT INTERVALS THEREALONG OF A VALVE CONTROLLING EACH OF SAID PORTS AND A VALVE ACTUATOR DEVICE RECEIVED IN SAID TUBING AND NORMALLY MOVABLE THEREALONG PAST SAID VALVES, SAID DEVICE INCLUDING MECHANISM FOR ENGAGING AND OPENING SAID VALVES SELECTIVELY DURING MOVEMENT ALONG SAID TUBING AND MEANS OPERATIVE-
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |