Patent US3686375A successfully refreshed from Google Patents.
US3686375A
Expired / Lapsed
US
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Method of sealing or jointing
Assignee: Imperial Chemical Industries Ltd
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Filing: 1970-05-11
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Granted: 1972-08-22
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Expires: 1990-05-11
Abstract
Abstract A method of effecting a seal in a system operating under pressure, e.g., a pipeline carrying ethylene at high pressure, wherein the appropriate part of the system is surrounded with a rigid shell containing material, e.g., a synthetic resin, which is allowed to set to form bonds with the shell and the appropriate part of the system capable of withstanding the internal pressure of the system. The method may be used to joint pipes onto pipelines by a modification of the ''''hot-tapping'''' technique.
Inventors
- 👤 Alan Frank Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:39
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/04; F16L41/06; F16L55/00; F16L55/16; F16L55/168; F16L55/17; F16L55/172
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
14 words
A method according to claim 1 wherein the rigid shell is formed from steel.
Claim 2
Dependent Claim
28 words
A method according to claim 1 wherein the rigid shell is constructed in a plurality of sections which are joined together around the appropriate part of the system.
Claim 3
Dependent Claim
24 words
A method according to claim 1 wherein the material is a synthetic resin selected from the group consisting of polyester, phenol/formaldehyde and epoxy resins.
Claim 4
Dependent Claim
17 words
A method as in claim 1 wherein the vent is closed by filling it with settable material.
Claim 5
Dependent Claim
22 words
A method as in claim 1 wherein the system is operating at an internal pressure of between about 600 to 1,400 psig.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |