Patent US4590971A successfully refreshed from Google Patents.
US4590971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated pipeline
Assignee: Webco Industrial Rubber Ltd
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Filing: 1983-12-22
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Granted: 1986-05-27
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Expires: 2003-12-22
Abstract
Abstract An insulated pipeline having spaced sections of heat-insulating material held between a continuous corrosion-resistant coating on the pipe and an outer protective jacket, thereby to provide a flexible composite which renders the pipeline resistant to mechanical and chemical attack while provided heat insulation for the pipeline in a manner which allows the pipeline to flex, for example during laying. The pipeline is preferably in the form of a continuous protective matrix bonded to the pipe and enveloping individual sections of the heat-insulating material.
Inventors
- 👤 George A. Webster
- 👤 Brian J. Wadie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:38
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/143; Y; Y10; Y10S; Y10S138/00; Y10S138/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
An insulated pipeline having a pipe, a continuous coating of non-foamed resilient water-impermeable corrosion-resistant material around the pipe, heat-insulating material disposed around the corrosion-resistant coating and isolated from the pipe by the corrosion-resistant coating, the heat-insulating material being in sections which are mutually spaced along the pipeline, and a continuous abrasion-resistant jacket of protective non-foamed resilient water-impermeable material disposed around the heat-insulating material for protection against mechanical damage, the corrosion-resistant coating and the protective jacket being bonded together by non-foamed water-impermeable resilient material extending between the sections of heat-insulating material so that the corrosion-resistant coating, the protective jacket and the resilient material together form a continuous non-foamed matrix which encloses and surrounds the sections of heat insulating material thereby to enclose and isolate each section of heat-insulating material from adjacent sections of heat-insulating material.
Claim 2
Dependent Claim
134 words
An insulated pipeline having a pipe, a continuous coating of non-foamed resilient water-impermeable corrosion-resistant material around the pipe, heat-insulating material disposed around the corrosion-resistant coating and isolated from the pipe by the corrosion-resistant coating, the heat-insulating material being in sections which are mutually spaced along the pipeline, and a continuous abrasion-resistant jacket of protective non-foamed resilient water-impermeable material disposed around the heat-insulating material for protection against mechanical damage, the corrosion-resistant coating and the protective jacket being bonded together by non-foamed water-impermeable resilient material extending between the sections of heat-insulating material so that the corrosion-resistant coating, the protective jacket and the resilient material together form a continuous non-foamed matrix which encloses and surrounds the sections of heat insulating material thereby to enclose and isolate each section of heat-insulating material from adjacent sections of heat-insulating material.
Claim 3
Dependent Claim
25 words
An insulated pipeline according to claim 1, wherein the resilient material between the sections of the heat-insulating material is the same as the protective material.
Claim 4
Dependent Claim
19 words
An insulated pipeline according to claim 1, wherein the corrosion-resistant coating is bonded along its length to the pipe.
Claim 5
Dependent Claim
18 words
An insulated pipeline according to claim 1, wherein both the corrosion-resistant material and the protective material are elastomeric.
Claim 6
Dependent Claim
23 words
An insulated pipeline according to claim 1, wherein the corrosion-resistant coating has a thickness in the range from 4 mm to 10 mm.
Claim 7
Dependent Claim
40 words
An insulated pipeline according to claim 1, wherein the sections of the heat-insulating material are each part-cylindrical and the circumference of the pipe is surrounded by a plurality of said sections mutually angularly spaced and separated by said resilient material.
References Cited (Backward Citations)
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Cited
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US3728187A
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US3830899A
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US4040165A
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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) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |