US3382930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast joint
Assignee: Keystone Valve Corp
•
Filing: 1966-03-09
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Granted: 1968-05-14
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Expires: 1986-03-09
Abstract
No abstract record available.
Inventors
- 👤 Virginia S Ribb
- 👤 Jr Arthur H Snell
- 👤 Dale E Fulmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:12
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1085; E21B43/00; E21B43/02; E21B43/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A CERAMIC BLAST JOINT TO BE INSTALLED IN A TUBING STRING OPPOSITE A PRODUCING ZONE IN A WELL, COMPRISING A JOINT OF TUBING, A PLURALITY OF TUBULAR MEMBERS OF CERAMIC MATERIAL OF THE ISOSTATIC TYPE POSITIONED ON SAID JOINT IN END TO END RELATIONSHIP WITH THEIR END SURFACES FACING TO FORM A PROTECTIVE SLEEVE COVERING THE OUTSIDE SURFACE OF AT LEAST A PORTION OF SAID JOINT, MEANS FOR HOLDING SAID SECTIONS IN END TO END RELATIONSHIP, AND MEANS FOR PROTECTING THE CERAMIC MEMBERS FROM BEING CHIPPED OR BROKEN BY HAVING THE OUTER EDGES OF THEIR END SURFACES HITTING OBSTRUCTIONS WHILE THE JOINT IS BEING POSITIONED IN THE WELL, SAID MEANS
Claim 2
Dependent Claim
110 words
A CERAMIC BLAST JOINT TO BE INSTALLED IN A TUBING STRING OPPOSITE A PRODUCING ZONE IN A WELL, COMPRISING A JOINT OF TUBING, A PLURALITY OF TUBULAR MEMBERS OF CERAMIC MATERIAL OF THE ISOSTATIC TYPE POSITIONED ON SAID JOINT IN END TO END RELATIONSHIP WITH THEIR END SURFACES FACING TO FORM A PROTECTIVE SLEEVE COVERING THE OUTSIDE SURFACE OF AT LEAST A PORTION OF SAID JOINT, MEANS FOR HOLDING SAID SECTIONS IN END TO END RELATIONSHIP, AND MEANS FOR PROTECTING THE CERAMIC MEMBERS FROM BEING CHIPPED OR BROKEN BY HAVING THE OUTER EDGES OF THEIR END SURFACES HITTING OBSTRUCTIONS WHILE THE JOINT IS BEING POSITIONED IN THE WELL, SAID MEANS
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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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |