Patent US2187624A successfully refreshed from Google Patents.
Patent US2761514A successfully refreshed from Google Patents.
US2761514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing drilling mud from a well having a prepacked liner
Assignee: Kobe Inc
•
Filing: 1950-06-12
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Granted: 1956-09-04
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Expires: 1970-06-12
Abstract
No abstract record available.
Inventors
- 👤 Clarence J Coberly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:31
CPC Classifications
E; E21; E21B; E21B37/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A STRUCTURE OF THE CHARACTER DESCRIBED, THE COMBINATION OF: A LINER INCLUDING A FORAMINOUS INTERMEDIATE SECTION AND HAVING AN INLET PASSAGE ADJACENT ONE END THEREOF AND AN OUTLET PASSAGE ADJACENT THE OTHER END THEREOF; AN INLET VALVE MEANS FOR OPENING AND CLOSING SAID INLET PASSAGE; AN OUTLET VALVE MEANS FOR OPENING AND CLOSING SAID OUTLET PASSAGE; A TUBING INSERABLE INTO SAID LINER; MEANS FOR THREADEDLY CONNECTING SAID TUBING TO SAID LINER WITH SAID TUBING IN FLUID COMMUNICATION WITH
Claim 2
Dependent Claim
79 words
IN A STRUCTURE OF THE CHARACTER DESCRIBED, THE COMBINATION OF: A LINER INCLUDING A FORAMINOUS INTERMEDIATE SECTION AND HAVING AN INLET PASSAGE ADJACENT ONE END THEREOF AND AN OUTLET PASSAGE ADJACENT THE OTHER END THEREOF; AN INLET VALVE MEANS FOR OPENING AND CLOSING SAID INLET PASSAGE; AN OUTLET VALVE MEANS FOR OPENING AND CLOSING SAID OUTLET PASSAGE; A TUBING INSERABLE INTO SAID LINER; MEANS FOR THREADEDLY CONNECTING SAID TUBING TO SAID LINER WITH SAID TUBING IN FLUID COMMUNICATION WITH
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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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |