US3294108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas lift valve
Assignee: Otis Engineering Corp
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Filing: 1964-01-20
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Granted: 1966-12-27
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Expires: 1984-01-20
Abstract
No abstract record available.
Inventors
- 👤 Purvis J Thrash
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:37
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/12; E21B43/121; E21B43/122; E21B43/123; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/2934; Y10T137/7722; Y10T137/7781; Y10T137/7835; Y10T137/7836; Y10T137/7837; Y10T137/7838; Y10T137/7843
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
A VALVE INCLUDING: A TUBULAR MANDREL; A TUBULAR HOUSING DISPOSED ON SAID MANDREL AND PROVIDING WITH SAID MANDREL AN ANNULAR LONGITUDINALLY EXTENDING CHAMBER ABOUT SAID MANDREL; A TUBULAR FLEXIBLE SLEEVE VALVE DISPOSED IN SAID ANNULAR CHAMBER AND DIVIDING SAID ANNULAR CHAMBER INTO AN ANNULAR FLOW PASSAGE AND A CHARGE CHAMBER, SAID HOUSING AND SAID MANDREL HAVING LATERAL PORTS OPENING TO SAID FLOW PASSAGE AT LONGITUDINALLY SPACED LOCATIONS, SAID SLEEVE VALVE BEING BIASED BY THE PRESSURE OF A CHARGE OF GAS IN SAID CHARGE CHAMBER TOWARD ENGAGEMENT WITH ONE OF SAID MANDREL AND SAID HOUSING TO CLOSE THE PORTS THEREOF; AND REINFORCING MEANS IN SAID FLEXIBLE SLEEVE PROVIDING PROTUBERANCES THEREON EACH ENGAGEABLE WITH ONE OF SAID LATERAL PORTS OF SAID ONE OF SAID MANDREL AND SAID HOUSING TO CLOSE SAID PORT; SAID REINFORCING MEANS HAVING A PORTION SURROUNDING SAID PROTUBERANCE HOLDING THE PORTION OF SAID SLEEVE ADJACENT SAID PROTUBERANCE OUT OF ENGAGEMENT WITH THAT PORTION OF SAID ONE OF SAID MANDREL AND SAID HOUSING ADJACENT SAID PORT TO ADMIT FLUID PRESSURE BETWEEN THE SLEEVE AND SAID ONE OF SAID MANDREL AND SAID HOUSING ADJACENT SAID PORT.
Claim 2
Dependent Claim
185 words
A VALVE INCLUDING: A TUBULAR MANDREL; A TUBULAR HOUSING DISPOSED ON SAID MANDREL AND PROVIDING WITH SAID MANDREL AN ANNULAR LONGITUDINALLY EXTENDING CHAMBER ABOUT SAID MANDREL; A TUBULAR FLEXIBLE SLEEVE VALVE DISPOSED IN SAID ANNULAR CHAMBER AND DIVIDING SAID ANNULAR CHAMBER INTO AN ANNULAR FLOW PASSAGE AND A CHARGE CHAMBER, SAID HOUSING AND SAID MANDREL HAVING LATERAL PORTS OPENING TO SAID FLOW PASSAGE AT LONGITUDINALLY SPACED LOCATIONS, SAID SLEEVE VALVE BEING BIASED BY THE PRESSURE OF A CHARGE OF GAS IN SAID CHARGE CHAMBER TOWARD ENGAGEMENT WITH ONE OF SAID MANDREL AND SAID HOUSING TO CLOSE THE PORTS THEREOF; AND REINFORCING MEANS IN SAID FLEXIBLE SLEEVE PROVIDING PROTUBERANCES THEREON EACH ENGAGEABLE WITH ONE OF SAID LATERAL PORTS OF SAID ONE OF SAID MANDREL AND SAID HOUSING TO CLOSE SAID PORT; SAID REINFORCING MEANS HAVING A PORTION SURROUNDING SAID PROTUBERANCE HOLDING THE PORTION OF SAID SLEEVE ADJACENT SAID PROTUBERANCE OUT OF ENGAGEMENT WITH THAT PORTION OF SAID ONE OF SAID MANDREL AND SAID HOUSING ADJACENT SAID PORT TO ADMIT FLUID PRESSURE BETWEEN THE SLEEVE AND SAID ONE OF SAID MANDREL AND SAID HOUSING ADJACENT SAID PORT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |