US4539254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcing composite for roofing membranes and process for making such composites
Assignee: Saint Gobain Technical Fabrics Canada Ltd
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Filing: 1984-12-20
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Granted: 1985-09-03
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Expires: 2004-12-20
Abstract
Abstract A reinforcing composite for bituminous roofing membranes is made by laminating fiberglass and polyester mats and scrims coated with selected adhesives.
Inventors
- 👤 Terry J. O'Connor
- 👤 Ian G. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:06
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/08; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; D; D06; D06N; D06N3/00; D06N3/04; D06N3/06; D06N5/00; E; E04; E04D; E04D5/00; E04D5/10; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/042; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2262/10; B32B2262/101; B32B2305/00; B32B2305/08; B32B2419/00; B32B2419/06; Y; Y10; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/153; Y10T442/159
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A composite for reinforcing roofing membranes comprising three or more layers bonded together with a thermosetting resin one of which layers is made of fiberglass, one of which is made of polyester, and the third of which is made of either polyester or fiberglass; further, at least one of which is in the form of a scrim, one of which is in the form of a mat, and a third of which is in the form of a mat or a scrim; wherein the composite is flexible, capable of being impregnated by a bitumenous material, and has sufficient strength to be useful in reinforcing membrances.
Claim 2
Dependent Claim
105 words
A composite for reinforcing roofing membranes comprising three or more layers bonded together with a thermosetting resin one of which layers is made of fiberglass, one of which is made of polyester, and the third of which is made of either polyester or fiberglass; further, at least one of which is in the form of a scrim, one of which is in the form of a mat, and a third of which is in the form of a mat or a scrim; wherein the composite is flexible, capable of being impregnated by a bitumenous material, and has sufficient strength to be useful in reinforcing membrances.
Claim 3
Dependent Claim
17 words
The composite of claim 1 in which the layers are two fiberglass mats and a polyester scrim.
Claim 4
Dependent Claim
20 words
The composite of claim 1 in which the layers are two fiberglass mats, a polyester scrim, and a polyester mat.
Claim 5
Dependent Claim
20 words
The composite of claim 1 in which the layers are a polyester mat, a polyester scrim, and a fiberglass mat.
Claim 6
Dependent Claim
23 words
The composite of claim 1 in which the layers are a fiberglass mat, a fiberglass scrim, a polyester scrim, and a polyester mat.
Claim 7
Dependent Claim
20 words
The composite of claim 1 in which the layers are two polyester mats, a fiberglass scrim, and a polyester mat.
Claim 8
Dependent Claim
20 words
The composite of claim 1 in which the layers are a fiberglass mat, a polyester scrim, and a fiberglass scrim.
Claim 9
Dependent Claim
146 words
A process for making a composite to use in reinforcing roofing membranes comprising the steps of; selecting at least three materials, one of which is fiberglass, one of which is polyester, and the third of which is fiberglass or polyester; one of which is in the form of a scrim, one of which is the form of a mat, and the third of which is in the form of either a mat or a scrim; applying to at least one scrim a coating of thermosetting adhesive; combining the other selected materials with said scrim before the adhesive has fully set; and thereafter causing the adhesive to set further, thus binding the materials together into a composite; and cooling the composite thus created; wherein the resulting composite is flexible, capable of being impregnated by bitumenous material, and has sufficient strength to be useful in reinforcing roofing membranes.
Claim 10
Dependent Claim
146 words
A process for making a composite to use in reinforcing roofing membranes comprising the steps of; selecting at least three materials, one of which is fiberglass, one of which is polyester, and the third of which is fiberglass or polyester; one of which is in the form of a scrim, one of which is the form of a mat, and the third of which is in the form of either a mat or a scrim; applying to at least one scrim a coating of thermosetting adhesive; combining the other selected materials with said scrim before the adhesive has fully set; and thereafter causing the adhesive to set further, thus binding the materials together into a composite; and cooling the composite thus created; wherein the resulting composite is flexible, capable of being impregnated by bitumenous material, and has sufficient strength to be useful in reinforcing roofing membranes.
Claim 11
Dependent Claim
34 words
The process of claim 8 in which the adhesive is a water-based cross linkable adhesive and the materials after being combined are passed over heated rollers which cause drying and setting of the adhesive.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |