US3220437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blast coating and method of applying the same to tubing
Assignee: ZAPATA LINING CORP
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Filing: 1963-03-28
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Granted: 1965-11-30
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Expires: 1983-03-28
Abstract
No abstract record available.
Inventors
- 👤 William J Safford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:53
CPC Classifications
F; F16; F16L; F16L57/00; F16L57/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
THE COMBINATION WITH A WELL TUBING HAVING A PART FOR TRAVERSING A PRODUCTION ZONE OF A PROTECTIVE COVERING FOR SAID PART COMPRISING A PLURALITY OF RINGS LODGED ON THE TUBING IN LONGITUDINALLY SPACED RELATION THEREALONG, A PLURALITY OF SLEEVES OF RIGID, SHOCK RESISTANT MATERIAL LODGED ON SAID RINGS IN END-TO-END ABUTMENT ABOUT SAID, TUBING, SAID RINGS BEING LOCATED BETWEEN THE END PORTIONS OF SAID SLEEVES AND THE WELL TUBING AND THE THICKNESS AND SPACING OF SAID RINGS FROM EACH OTHER AND THE SPACING OF SAID SLEEVES FROM SAID TUBING BEING ADJUSTED TO ACCOMMODATE LIMITED FLEXTURE OF SAID TUBING WITHIN EACH OF SAID SLEEVES, AND A COATING OF ABRASIVE RESISTANT MATERIAL ABOUT SAID SLEEVES.
Claim 2
Dependent Claim
113 words
THE COMBINATION WITH A WELL TUBING HAVING A PART FOR TRAVERSING A PRODUCTION ZONE OF A PROTECTIVE COVERING FOR SAID PART COMPRISING A PLURALITY OF RINGS LODGED ON THE TUBING IN LONGITUDINALLY SPACED RELATION THEREALONG, A PLURALITY OF SLEEVES OF RIGID, SHOCK RESISTANT MATERIAL LODGED ON SAID RINGS IN END-TO-END ABUTMENT ABOUT SAID, TUBING, SAID RINGS BEING LOCATED BETWEEN THE END PORTIONS OF SAID SLEEVES AND THE WELL TUBING AND THE THICKNESS AND SPACING OF SAID RINGS FROM EACH OTHER AND THE SPACING OF SAID SLEEVES FROM SAID TUBING BEING ADJUSTED TO ACCOMMODATE LIMITED FLEXTURE OF SAID TUBING WITHIN EACH OF SAID SLEEVES, AND A COATING OF ABRASIVE RESISTANT MATERIAL ABOUT SAID SLEEVES.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |