US4284470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength roofing products using novel glass fiber mats
Assignee: Building Materials Corp of America
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Filing: 1979-09-26
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Granted: 1981-08-18
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Expires: 1999-09-26
Abstract
Abstract High strength roofing products using a novel glass fiber mat are described herein. The roofing products include shingles and built up roofing membranes and systems.
Inventors
- 👤 Alfredo A. Bondoc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:46
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/61; C; C03; C03C; C03C25/00; C03C25/10; C03C25/24; C03C25/25; D06; D06N; D06N5/00; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/08; D21H23/10; D21H5/00; D21H5/12; D21H5/1254; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/26; Y10T428/266; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
161 words
A high-strength roofing product comprising: (A) a glass fiber mat consisting essentially of glass fibers, voids extending through the thickness of said mat and a binder to hold said fibers together, said fibers having a length of about 1/4 to 3 inches and a diameter of about 3 to 20 microns, said mat having a thickness of about 0.3 to 3 mm. and a basis weight of about 20 to 200 g./m 2 , characterized in that; (a) at least about 70% by weight of said fibers of substantially the same fiber length, are substantially uniformly enmeshed individual filament fibers, (b) less than about 20% of the area of said mat are voids which extends through the thickness of the mat, the rest being fibers, and, (c) at least about 80%, 30% and 10% of said voids have an equivalent diameter which is less than about 50, 10 and 5 microns, respectively, and, (B) a bituminous material impregnated in said mat.
Claim 2
Dependent Claim
161 words
A high-strength roofing product comprising: (A) a glass fiber mat consisting essentially of glass fibers, voids extending through the thickness of said mat and a binder to hold said fibers together, said fibers having a length of about 1/4 to 3 inches and a diameter of about 3 to 20 microns, said mat having a thickness of about 0.3 to 3 mm. and a basis weight of about 20 to 200 g./m 2 , characterized in that; (a) at least about 70% by weight of said fibers of substantially the same fiber length, are substantially uniformly enmeshed individual filament fibers, (b) less than about 20% of the area of said mat are voids which extends through the thickness of the mat, the rest being fibers, and, (c) at least about 80%, 30% and 10% of said voids have an equivalent diameter which is less than about 50, 10 and 5 microns, respectively, and, (B) a bituminous material impregnated in said mat.
Claim 3
Dependent Claim
21 words
A roofing product according to claim 1 wherein said individual filament fibers comprise at least 80% by weight of said fibers.
Claim 4
Dependent Claim
21 words
A roofing product according to claim 1 wherein said individual filament fibers comprise at least 90% by weight of said fibers.
Claim 5
Dependent Claim
19 words
A roofing product according to claim 1 wherein the length of said fibers are about 1/2 to 11/2 inches.
Claim 6
Dependent Claim
19 words
A roofing product according to claim 1 wherein the diameter of said fibers is about 12 to 19 microns.
Claim 7
Dependent Claim
19 words
A roofing product according to claim 1 wherein said thickness of said mat is about 0.3 to 2 mm.
Claim 8
Dependent Claim
23 words
A roofing product according to claim 1 wherein said basis weight of said glass mat is about 40 to 150 g./m 2 .
Claim 9
Dependent Claim
27 words
A roofing product according to claim 1 wherein said fibers comprise about 70% to 90% and said binder about 10% to 30% by weight of said mat.
Claim 10
Dependent Claim
28 words
A roofing product according to claim 1 wherein the tensile strength of the glass mat is at least 300 and 100 N/50 mm width, MD and CMD, respectively.
Claim 11
Dependent Claim
28 words
A roofing product according to claim 1 wherein at least 15% of said voids in said glass mat have an equivalent diameter which is less than 5 microns.
Claim 12
Dependent Claim
14 words
A roofing product according to claim 1 wherein said product is a roofing shingle.
Claim 13
Dependent Claim
23 words
A roofing product according to claim 1 wherein said bituminous material also is present as a coating on both sides of said mat.
Claim 14
Dependent Claim
128 words
A roofing product according to claim 1 wherein in (A) said glass fibers have a fiber length of about 1 inch, a fiber diameter of about 16 microns, a glass mat thickness of about 1 mm., a basis weight of about 110 g./m 2 , fiber and binder contents of about 80% and 20%, respectively, tensile strengths of about 500 and 400 N/50 mm. width MD and CMD, respectively, further characterized in that in (a) about 85% by weight of said fibers are substantially uniformly enmeshed individual filament fibers, in (b) about 18.4% by area of said mat are voids, the rest being fibers, in (c) about 82.9%, 37.0% and 17.9% of said voids having an equivalent diameter which is less than 50, 10 and 5 microns, respectively.
Claim 15
Dependent Claim
23 words
A high-strength built up roofing product according to claim 1 in which said product is a membrane which is in rolled up form.
Claim 16
Dependent Claim
24 words
A built up roofing product according to claim 14 having a tensile strength of about 500 to 700 MD and 150 to 250 CMD.
Claim 17
Dependent Claim
16 words
A product according to claim 14 wherein the tensile strength is 800 MD and 300 CMD.
Claim 18
Dependent Claim
19 words
A product according to claim 14 wherein the MD tensile strength is approximately equal to the CMD tensile strength.
Claim 19
Dependent Claim
20 words
A product according to claim 14 wherein the tensile strength MD is at least 100, 300 or 500 N/50 mm.
Claim 20
Dependent Claim
29 words
A built up roofing system comprising: (a) multiple plies of said high-strength built up roofing product as defined in claim 1, and (b) adhesive asphaltic coatings between said membranes.
Claim 21
Dependent Claim
13 words
A system according to claim 19 having three plies of said roofing products.
Claim 22
Dependent Claim
23 words
A system according to claim 19 in which the bottom ply is secured to a roof deck with an additional adhesive asphaltic coating.
Claim 23
Dependent Claim
20 words
A system according to claim 19 in said bottom ply is secured to a roof deck with a mechanical fastener.
Claim 24
Dependent Claim
18 words
A system according to claim 19 further characterized by including on said top ply an asphaltic top coating.
Claim 25
Dependent Claim
18 words
A system according to claim 23 in which said asphaltic top coating includes an aggregate surfacing material thereon.
Claim 26
Dependent Claim
39 words
A 3 ply roofing system according to claim 17 having a tensile strength CMD at 0° F. of about 315 lbs/inch and 210 lbs/inch CMD at 77° F., at a glass mat basis weight of 114 g/m 2 .
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) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |