US4780350A
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: 1986-06-06
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Granted: 1988-10-25
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Expires: 2006-06-06
Abstract
Abstract A reinforcing composite for bituminous roofing membranes comprises a mechanically-fastened, open network of continuous filament, high tenacity polyester yarn. This structure is heat stabilized and may be combined with a fiberglass scrim and/or treated with a resin.
Inventors
- 👤 Terry J. O'Connor
- 👤 Ian G. Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:36
CPC Classifications
D; D06; D06N; D06N5/00; D04; D04B; D04B21/00; D04B21/14; D04B21/16; D04B21/165; D04H; D04H3/00; D04H3/08; D04H3/10; D04H5/00; D04H5/02; D10; D10B; D10B2403/00; D10B2403/02; D10B2403/024; D10B2403/0241; D10B2403/02412; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24033; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/159
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
54 words
A composite for reinforcing roofing membranes comprising a fiberglass scrim combined with a lightweight preformed synthetic mat mechanically fastened by knitting to an open network of continuous filament polyester yarn wherein the composite is heat-stable, flexible, capable of being impregnated by nituminous material, and of sufficient strength to be useful in reinforcing such membranes.
Claim 2
Dependent Claim
54 words
A composite for reinforcing roofing membranes comprising a fiberglass scrim combined with a lightweight preformed synthetic mat mechanically fastened by knitting to an open network of continuous filament polyester yarn wherein the composite is heat-stable, flexible, capable of being impregnated by nituminous material, and of sufficient strength to be useful in reinforcing such membranes.
Claim 3
Dependent Claim
54 words
A composite impregnated with a thermosetting resin for reinforcing roofing membranes comprising a lightweight preformed synthetic mat mechanically fastened by knitting to an open network of continuous filament polyester yarn wherein the composite is heat-shrink, flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing such membranes.
Claim 4
Dependent Claim
54 words
A composite impregnated with a thermosetting resin for reinforcing roofing membranes comprising a lightweight preformed synthetic mat mechanically fastened by knitting to an open network of continuous filament polyester yarn wherein the composite is heat-shrink, flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing such membranes.
Claim 5
Dependent Claim
15 words
The composite of claim 1 in which the composite is impregnated with a thermosetting resin.
Claim 6
Dependent Claim
17 words
The composite of claim 2 in which the resin impregnation occurs before heat shrinking of the composite.
Claim 7
Dependent Claim
15 words
The composite of claim 4 in which the composite is combined with a fiberglass scrim.
Claim 8
Dependent Claim
75 words
A process for making a composite for use in reinforcing roofing membranes comprising the steps of: selecting a lightweight preformed synthetic mat, mechanically fastening by knitting said mat to an open network of continuous filament polyester yarn structure, heat shrinking the resulting composite, and combining the composite with a fiberglass scrim, wherein the resulting composite is flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing roofing membranes.
Claim 9
Dependent Claim
75 words
A process for making a composite for use in reinforcing roofing membranes comprising the steps of: selecting a lightweight preformed synthetic mat, mechanically fastening by knitting said mat to an open network of continuous filament polyester yarn structure, heat shrinking the resulting composite, and combining the composite with a fiberglass scrim, wherein the resulting composite is flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing roofing membranes.
Claim 10
Dependent Claim
75 words
A process for making a composite for use in reinforcing roofing membranes comprising the steps of: selecting a lightweight preformed synthetic mat, mechanically fastening by knitting said mat to an open network of continuous filament polyester yarn structure, heat shrinking the resulting composite, and impregnating the composite with a thermosetting resin, wherein the resulting composite is flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing roofing membranes.
Claim 11
Dependent Claim
75 words
A process for making a composite for use in reinforcing roofing membranes comprising the steps of: selecting a lightweight preformed synthetic mat, mechanically fastening by knitting said mat to an open network of continuous filament polyester yarn structure, heat shrinking the resulting composite, and impregnating the composite with a thermosetting resin, wherein the resulting composite is flexible, capable of being impregnated by bituminous material, and of sufficient strength to be useful in reinforcing roofing membranes.
Claim 12
Dependent Claim
17 words
The process of claim 6 comprising the additional step of impregnating the composite with a thermosetting resin.
Claim 13
Dependent Claim
12 words
The process of claim 8 wherein resin treatment occurs before heat shrinking.
References Cited (Backward Citations)
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Cited
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |