Patent US5109894A successfully refreshed from Google Patents.
US3092191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber sleeve core barrel apparatus
Assignee: Norton Christensen Inc
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Filing: 1960-11-07
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Granted: 1963-06-04
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Expires: 1980-11-07
Abstract
No abstract record available.
Inventors
- 👤 Mori Takeshi
- 👤 Robert I Peters
- 👤 Benjamin L Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:02
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN APPARATUS ADAPTED TO BE SECURED TO A TUBULAR DRILL STRING FOR PRODUCING AND RETRIEVING A CORE IN A BORE HOLE: A DRIVING STRUCTURE ADAPTED TO BE CONNECTED TO THE DRILL STRING AND TO A BIT FOR CUTTING A CORE IN THE BORE HOLE; AN INNER TUBULAR MEMBER WITHIN AND CONNECTED TO SAID STRUCTURE; AN ELASTIC SLEEVE ON THE EXTERIOR OF SAID TUBULAR MEMBER EXTENDING AROUND THE LOWER END OF SAID TUBULAR MEMBER AND ADAPTED TO MOVE UPWARDLY THEREINTO AROUND A CORE EXTENDING THEREWITHIN; PULLING MEANS IN SAID TUBULAR MEMBER CONNECTED TO SAID SLEEVE; AND MEANS SECURED TO SAID PULLING MEANS AND EXTENDING UPWARDLY THROUGH THE DRILL STRING TO THE TOP OF THE BORE HOLE FOR PREVENTING DOWNWARD MOVEMENT OF SAID PULLING MEANS IN THE BORE HOLE AS THE BIT CUTS THE CORE AND SAID DRIVING STRUCTURE AND INNER TUBULAR MEMBER MOVE DOWNWARDLY IN THE BORE HOLE.
Claim 2
Dependent Claim
147 words
IN APPARATUS ADAPTED TO BE SECURED TO A TUBULAR DRILL STRING FOR PRODUCING AND RETRIEVING A CORE IN A BORE HOLE: A DRIVING STRUCTURE ADAPTED TO BE CONNECTED TO THE DRILL STRING AND TO A BIT FOR CUTTING A CORE IN THE BORE HOLE; AN INNER TUBULAR MEMBER WITHIN AND CONNECTED TO SAID STRUCTURE; AN ELASTIC SLEEVE ON THE EXTERIOR OF SAID TUBULAR MEMBER EXTENDING AROUND THE LOWER END OF SAID TUBULAR MEMBER AND ADAPTED TO MOVE UPWARDLY THEREINTO AROUND A CORE EXTENDING THEREWITHIN; PULLING MEANS IN SAID TUBULAR MEMBER CONNECTED TO SAID SLEEVE; AND MEANS SECURED TO SAID PULLING MEANS AND EXTENDING UPWARDLY THROUGH THE DRILL STRING TO THE TOP OF THE BORE HOLE FOR PREVENTING DOWNWARD MOVEMENT OF SAID PULLING MEANS IN THE BORE HOLE AS THE BIT CUTS THE CORE AND SAID DRIVING STRUCTURE AND INNER TUBULAR MEMBER MOVE DOWNWARDLY IN THE BORE HOLE.
References Cited (Backward Citations)
US2927775A
Cited
US2927776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |