Patent US3112795A successfully refreshed from Google Patents.
US3112795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable subsurface well tool
Assignee: Baker Hughes Oilfield Operations LLC
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Filing: 1960-11-14
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Granted: 1963-12-03
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Expires: 1980-11-14
Abstract
No abstract record available.
Inventors
- 👤 Julian D Keithahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:10
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN APPARATUS ADAPTED TO BE OPERATED IN A WELL BORE: AN OUTER TUBULAR MEMBER; AN INNER TUBULAR MEMBER TELESCOPED IN SAID OUTER MEMBER; A PISTON MOVABLE WITHIN SAID OUTER MEMBER AND ALONG WHICH SAID INNER MEMBER IS MOVABLE; AND LATCH MEANS CONNECTING SAID PISTON TO SAID INNER MEMBER WHEN SAID INNER MEMBER IS DISPOSED IN ONE POSITION ALONG SAID PISTON, SAID LATCH MEANS DISCONNECTING SAID PISTON FROM SAID INNER MEMBER WHEN SAID INNER MEMBER IS DISPOSED IN ANOTHER POSITION ALONG SAID PISTON.
Claim 2
Dependent Claim
82 words
IN APPARATUS ADAPTED TO BE OPERATED IN A WELL BORE: AN OUTER TUBULAR MEMBER; AN INNER TUBULAR MEMBER TELESCOPED IN SAID OUTER MEMBER; A PISTON MOVABLE WITHIN SAID OUTER MEMBER AND ALONG WHICH SAID INNER MEMBER IS MOVABLE; AND LATCH MEANS CONNECTING SAID PISTON TO SAID INNER MEMBER WHEN SAID INNER MEMBER IS DISPOSED IN ONE POSITION ALONG SAID PISTON, SAID LATCH MEANS DISCONNECTING SAID PISTON FROM SAID INNER MEMBER WHEN SAID INNER MEMBER IS DISPOSED IN ANOTHER POSITION ALONG SAID PISTON.
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) | 1966-12-02 | 1967-06-03 | 1967-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-02 | 1971-06-03 | 1971-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-02 | 1975-06-03 | 1975-12-03 | $7700.00 | Window Closed / Lapsed |