US3072202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core taker devices
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1960-03-09
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Granted: 1963-01-08
•
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 01:11
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.
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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 |