US3135103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible joint for drill string
Assignee: Individual
•
Filing: 1962-04-27
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Granted: 1964-06-02
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Expires: 1982-04-27
Abstract
No abstract record available.
Inventors
- 👤 Black Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/02; E21B17/04; E21B17/07; E21B17/073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A FLEXIBLE SUB FOR CONNECTION IN A DRILL STRING, SAID SUB COMPRISING: FIRST AND SECOND AXIALLY ALIGNED TUBULAR MEMBERS, A CYLINDRICAL EXTENSION OF REDUCED OUTSIDE DIAMETER ON AN END OF THE FIRST SAID MEMBER, A CYLINDRICAL SOCKET WITHIN AN END OF THE SECOND SAID MEMBER AND RECEIVING SAID CYLINDRICAL EXTENSION, THE AXIAL LENGTH OF SAID SOCKET AND SAID EXTENSION BEING SUBSTANTIALLY EQUAL, THE EXTENDING END OF SAID CYLINDRICAL EXTENSION BEING IN
Claim 2
Dependent Claim
71 words
A FLEXIBLE SUB FOR CONNECTION IN A DRILL STRING, SAID SUB COMPRISING: FIRST AND SECOND AXIALLY ALIGNED TUBULAR MEMBERS, A CYLINDRICAL EXTENSION OF REDUCED OUTSIDE DIAMETER ON AN END OF THE FIRST SAID MEMBER, A CYLINDRICAL SOCKET WITHIN AN END OF THE SECOND SAID MEMBER AND RECEIVING SAID CYLINDRICAL EXTENSION, THE AXIAL LENGTH OF SAID SOCKET AND SAID EXTENSION BEING SUBSTANTIALLY EQUAL, THE EXTENDING END OF SAID CYLINDRICAL EXTENSION BEING IN
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |