Patent US3225845A successfully refreshed from Google Patents.
US3225845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core barrel assembly
Assignee: Joy Manufacturing Co
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Filing: 1961-02-17
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Granted: 1965-12-28
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Expires: 1981-02-17
Abstract
No abstract record available.
Inventors
- 👤 James H Koontz
- 👤 Robert A Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:34
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
CORE BARREL ASSEMBLY FOR USE IN A DRILL STRING COMPRISING, A HEAD ASSEMBLY AXIALLY SLIDABLE IN SUCH A DRILL STRING, LATCHING MEANS FOR LATCHING CONNECTION OF SAID HEAD ASSEMBLY TO SUCH A DRILL STRING, CORE RECEIVING MEANS OPERATIVELY CONNECTED TO SAID HEAD ASSEMBLY FOR SLIDING MOVEMEMT IN SUCH DRILL STRING AND FOR MOVEMENT RELATIVE TO SAID HEAD ASSEMBLY, FLUID PASSAGE MEANS IN SAID HEAD ASSEMBLY FOR CONDUCTING PRESSURE FLUID FROM AN UPPER PORTION OF SUCH DRILL SRING TO THE LOWEERMOST END OF SUCH A DRILL STRING, A VALVE LOCATED IN SAID PASSAGE MEANS OPERATIVELY CONNECTED TO SAID CORE RECEIVING MEANS AND SLIDABLY MOUNTED IN SAID HEAD ASSEMBLY FOR CLOSING OFF SAID FLUID PASSAGE MEANS UPON UPWARD MOVEMENT OF SAID CORE RECEIVING MEANS RELATIVE TO SAID HEAD ASSEMBLY, AND SAID VALVE HAVING A UPPER FLUID REACTIVE SURFCE EXPOSED TO
Claim 2
Dependent Claim
138 words
CORE BARREL ASSEMBLY FOR USE IN A DRILL STRING COMPRISING, A HEAD ASSEMBLY AXIALLY SLIDABLE IN SUCH A DRILL STRING, LATCHING MEANS FOR LATCHING CONNECTION OF SAID HEAD ASSEMBLY TO SUCH A DRILL STRING, CORE RECEIVING MEANS OPERATIVELY CONNECTED TO SAID HEAD ASSEMBLY FOR SLIDING MOVEMEMT IN SUCH DRILL STRING AND FOR MOVEMENT RELATIVE TO SAID HEAD ASSEMBLY, FLUID PASSAGE MEANS IN SAID HEAD ASSEMBLY FOR CONDUCTING PRESSURE FLUID FROM AN UPPER PORTION OF SUCH DRILL SRING TO THE LOWEERMOST END OF SUCH A DRILL STRING, A VALVE LOCATED IN SAID PASSAGE MEANS OPERATIVELY CONNECTED TO SAID CORE RECEIVING MEANS AND SLIDABLY MOUNTED IN SAID HEAD ASSEMBLY FOR CLOSING OFF SAID FLUID PASSAGE MEANS UPON UPWARD MOVEMENT OF SAID CORE RECEIVING MEANS RELATIVE TO SAID HEAD ASSEMBLY, AND SAID VALVE HAVING A UPPER FLUID REACTIVE SURFCE EXPOSED TO
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |