Patent US3127943A successfully refreshed from Google Patents.
US3127943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire line core barrel
Assignee: Norton Christensen Inc
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Filing: 1962-03-05
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Granted: 1964-04-07
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Expires: 1982-03-05
Abstract
No abstract record available.
Inventors
- 👤 Mori Takeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:21
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
80 words
IN CORING APPARATUS: AN OUTER CORE BARREL; AN INNER CORE BARREL STRUCTURE ADAPTED TO BE LOWERED INTO AND ELEVATED FROM SAID OUTER CORE BARREL; A SUSPENSION SLEEVE CARRIED BY SAID OUTER BARREL AND HAVING CIRCUMFERENTIALLY SPACED, LATERALLY EXPANDIBLE AND CONTRACTABLE LATCH FEET ENGAGEABLE BY AND EXPANDED OUTWARDLY BY SAID INNER BARREL STRUCTURE; SAID INNER BARREL STRUCTURE HAVING A SUSPENSION MEMBER AT ITS UPPER PORTION ADAPTED TO ENGAGE SAID FEET WHEN CONTRACTED TO SUSPEND SAID STRUCTURE IN SAID OUTER CORE BARREL.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |