US3757829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite pipe wrap material and method
Assignee: Johns Manville Corp
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Filing: 1971-05-12
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Granted: 1973-09-11
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Expires: 1991-05-12
Abstract
Abstract A composite pipe wrap material for underground pipe including a fiber glass pipe wrap material bonded to an outer protective pipe wrap material by a layer of adhesive which partially penetrates into the fiber glass wrap. The fiber glass wrap is preferably in the form of a mat. The composite pipe wrap material is adapted to position a portion of the fiber glass mat in approximately the outer one-third of the thickness of a metallic pipe protective coating when the material is wrapped about a metal pipe. Also disclosed is a method or protecting a metallic pipe by forming the composite pipe wrap material, coating the pipe with a protective coating and wrapping the pipe to position a portion of the fiber glass wrap in approximately the outer one-third of the thickness of the coating. Further disclosed is a method of positioning a portion of fiber glass pipe wrap material in approximately the outer one-third of the thickness of a protective coating on a metallic pipe.
Inventors
- 👤 G Berry
- 👤 M Gregory
- 👤 J Ambrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:51
CPC Classifications
F; F16; F16L; F16L58/00; F16L58/02; F16L58/04; F16L58/10; F16L58/1054; F16L58/1063; B; B32; B32B; B32B19/00; B32B19/06; B32B1/00; B32B1/08; B32B7/00; B32B7/04; B32B7/12; F16L58/12; F16L58/16; F16L59/00; F16L59/02; B32B2262/00; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/02; B32B2305/026; B32B2305/22; B32B2305/28; B32B2315/00; B32B2315/12; B32B2571/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
16 words
The article of claim 1 wherein said fiber glass pipe wrap material is fiber glass mat.
Claim 2
Dependent Claim
15 words
The article of claim 2 wherein said outer protective pipe wrap material is asbestos felt.
Claim 3
Dependent Claim
24 words
The article of claim 3 wherein said asbestos felt is saturated with a saturant selected from the group consisting of coal tar and asphalt.
Claim 4
Dependent Claim
39 words
The article of claim 4 wherein said outer protective pipe wrap material and said fiber glass mat pipe wrap material are bonded by a thin layer of laminating adhesive selected from the group consisting of coal tar and asphalt.
Claim 5
Dependent Claim
16 words
The article of claim 5 wherein said laminating adhesive comprises unplasticized, modifed or semi-plasticized coal tar.
Claim 6
Dependent Claim
21 words
The article of claim 5 wherein said fiber glass mat comprises an open network of glass fibers bonded with an adhesive.
Claim 7
Dependent Claim
15 words
The article of claim 5 wherein said saturated asbestos felt includes parallel glass yarn reinforcement.
Claim 8
Dependent Claim
29 words
The article of claim 5 wherein said metallic pipe is steel pipe and said protective coating is selected from the group consisting of coal tar enamel and asphalt enamel.
Claim 9
Dependent Claim
14 words
The article of claim 9 wherein said protective coating is about 5/64 inch thick.
Claim 10
Independent Claim
177 words
A method of protecting a metallic pipe, intended for underground use, from corrosion comprising: a. bonding one surface of a layer of pipe wrap material comprising fiber glass to a layer of outer protective pipe wrap material with a laminating adhesive which partially penetrates into said fiber glass pipe wrap thereby forming a composite pipe wrap, the other surface of said fiber glass pipe wrap being substantially free from said laminating adhesive and retaining a porour structure, b. coating and pipe with a protective coating, c. wrapping said pipe with said composite pipe wrap with said laminating adhesive-free surface of said fiber glass pipe wrap being placed in contact with said protective coating, said surface being penetrated by and embedded in said coating, said laminating adhesive being in contact with but unpenetrated by said protective coating a portion of said fiber glass pipe wrap being positioned in approximately the outer one-third of the thickness of said coating and approximately the lower two-thirds of the thickness of the coating being free of said fiber glass pipe wrap material.
Claim 11
Dependent Claim
15 words
The method of claim 11 wherein said fiber glass wrap material is fiber glass mat.
Claim 12
Dependent Claim
38 words
The method of claim 12 wherein said fiber glass mat pipe wrap material and said outer protective pipe wrap material are bonded with a layer of laminating adhesive selected from the group consisting of coal tar and asphalt.
Claim 13
Dependent Claim
15 words
The method of claim 13 wherein said adhesive comprises unplasticized, modified or semi-plasticized coal tar.
Claim 14
Dependent Claim
14 words
The method of claim 13 wherein said outer protective wrap is saturated asbestos felt.
Claim 15
Dependent Claim
22 words
The method of claim 14 wherein said protective coating is selected from the group consisting of coal tar enamel and asphalt enamel.
Claim 16
Independent Claim
177 words
A method of positioning a portion of fiber glass mat pipe wrap material in approximately the outer one-third of the thickness of a protective coating applied to a metallic pipe intended for underground installation, with approximately the lower two-thirds of the coating thickness being free of fiber glass mat, comprising: a. laminating one surface of said fiber glass mat pipe wrap material to a layer of outer protective pipe wrap with a thin layer of laminating adhesive to form a composite wrapping material, the other surface of said fiber glass mat being substantially free from the laminating adhesive and retaining a porous structure, and b. wrapping a metallic pipe coated with a protective coating with said composite wrapping material, said laminating adhesive-free surface being penetrated by and embedded into said coating, said coating extending into the pores of said fiber glass mat, said laminating adhesive being in contact with but unpenetrated by said coating, a portion of said fiber glass mat pipe wrap material bEing positioned in approximately the outer one-third of the thickness of said coating.
Claim 17
Dependent Claim
148 words
A pipe arrangement comprising: a. a pipe having a protective coating on its external surface; b. a composite pipe wrap material for wrapping said pipe, said pipe wrap mateial including; i. a layer of fiber glass material having a first surface and a second opposite surface, ii. a layer of outer protective wrap material, and iii. a layer of laminating adhesive material for bonding said layer of adhesive material to said first surface of said layer of fiber glass material, said adhesive material being disposed between said fiber glass material and said protective wrap material; and c. said composite wrap material being wrapped around said coated pipe such that said second surface of said layer of fiber glass material is penetrated by at most approximately the outer one-third portion of said protective coating and such that said adhesive material is in contact with but unpenetrated by said coating.
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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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |