Patent US2979591A successfully refreshed from Google Patents.
Patent US3229997A successfully refreshed from Google Patents.
US3229997A
Expired / Lapsed
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Disengageable latch means for dual string packers
Assignee: Dresser Industries Inc
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Filing: 1962-07-05
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Granted: 1966-01-18
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Expires: 1982-07-05
Abstract
No abstract record available.
Inventors
- 👤 Harry E Simpson
- 👤 Morgan L Crow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 21:40
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A DEVICE OF THE CLASS DESCRIBED, A BODY HAVING A PARALLEL LONGITUDINAL PASSAGES THERETHROUGH WITH A WALL THEREABOUT; A LATCH; MEANS PIVOTALLY ATTACHING THE LATCH TO THE WALL OF THE BODY; SAID LATCH HAVING A PORTION ON THE INNER SIDE THEREOF MOVABLE INTO ONE OF THE PASSAGES AND ANOTHER PORTION ON THE INNER SIDE OF SAID LATCH SPACED FROM THE FIRST NAMED PROTION AND MOVABLE INTO THE OTHER PASSAGE, SAID PORTIONS BEING ARRANGED TO ENTER THE PASSAGES FROM THE SAME SIDES THEREOF; AND SPRING MEANS ARRANGED BETWEEN THE BODY AND THE LATCH TO URGE THE LATCH INWARDLY OF THE PASSAGES.
Claim 2
Dependent Claim
101 words
IN A DEVICE OF THE CLASS DESCRIBED, A BODY HAVING A PARALLEL LONGITUDINAL PASSAGES THERETHROUGH WITH A WALL THEREABOUT; A LATCH; MEANS PIVOTALLY ATTACHING THE LATCH TO THE WALL OF THE BODY; SAID LATCH HAVING A PORTION ON THE INNER SIDE THEREOF MOVABLE INTO ONE OF THE PASSAGES AND ANOTHER PORTION ON THE INNER SIDE OF SAID LATCH SPACED FROM THE FIRST NAMED PROTION AND MOVABLE INTO THE OTHER PASSAGE, SAID PORTIONS BEING ARRANGED TO ENTER THE PASSAGES FROM THE SAME SIDES THEREOF; AND SPRING MEANS ARRANGED BETWEEN THE BODY AND THE LATCH TO URGE THE LATCH INWARDLY OF THE PASSAGES.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |