Patent US3072202A successfully refreshed from Google Patents.
US3072202A
Expired / Lapsed
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Core taker devices
Assignee: Schlumberger Well Surveying Corp
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Filing: 1960-03-09
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Granted: 1963-01-08
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Expires: 1980-03-09
Abstract
No abstract record available.
Inventors
- 👤 Emmet F Brieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:02
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A CORE TAKER OF THE PROJECTILE TYPE FOR OBTAINING CORE SAMPLES OF EARTH FORMATIONS COMPRISING A TUBULAR BODY MEMBER TO RECEIVE A CORE SAMPLE, AN INTEGRAL CUTTING RING HAVING A FORWARD CUTTING PORTION AND A TUBULAR REARWARD PORTION RECEIVED AT THE FORWARD END OF SAID BODY MEMBER, SAID TUBULAR PORTION HAVING A BREAKABLE SECTION OF SUBSTANTIALLY REDUCED CROSS SECTION OF A LENGTH TO SPACE SAID CUTTING PORTION FROM THE FRONT END OF SAID BODY MEMBER UNTIL BROKEN BY IMPACT, AND MEANS FOR SECURING SAID CUTING RING TO SAID BODY MEMBER.
References Cited (Backward Citations)
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US2721055A
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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) | 1966-01-07 | 1966-07-09 | 1967-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-07 | 1970-07-09 | 1971-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-07 | 1974-07-09 | 1975-01-08 | $7700.00 | Window Closed / Lapsed |