US4565724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofing-material
Assignee: Cbl Consolidated Ltd
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Filing: 1984-08-20
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Granted: 1986-01-21
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Expires: 2004-08-20
Abstract
Abstract The invention relates to a roofing-material provided with perforations and comprising a bituminized carrier with a non-sticking lower surface and destined for being applied on a substratum and for being covered by an upper layer, which may contain a carrier which is bituminized with modified bitumen, and which may be applied by means of a torch. According to the invention the carrier of the roofing-material is bituminized with modified bitumen, and the perforations are so large that the upper layer can be directly applied on the roofing-material by means of a torch and can be adhered to the substratum via the perforations.
Inventors
- 👤 Philippus R. J. Smits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:44
CPC Classifications
E; E04; E04D; E04D5/00; E04D5/12; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24777; Y10T428/24793; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/31504; Y10T428/31815; Y10T442/00; Y10T442/20; Y10T442/2926; Y10T442/2992; Y10T442/60; Y10T442/696
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
138 words
Roofing-material provided with perforations and comprising a bituminized carrier underlayer with a non-sticking lower surface and destined for being applied on a substratum and for being covered by an upper layer, which contains a carrier which is bituminized with modified bitumen, and which may be applied by means of torch, wherein the carrier of the roofing material is bituminized with modified bitumen, has a coating lying above and below the carrier, and the perforations extending therethrough having a smallest inner dimension of 50-110 mm, and preferably of about 70 mm, are so large that the upper layer can be directly applied on the roofing material by means of a torch thereby simultaneously adhering the upper layer and the bituminized carrier underlayer to the substratum, and the upper layer to the bituminized carrier underlayer itself, via the perforations only.
Claim 2
Dependent Claim
138 words
Roofing-material provided with perforations and comprising a bituminized carrier underlayer with a non-sticking lower surface and destined for being applied on a substratum and for being covered by an upper layer, which contains a carrier which is bituminized with modified bitumen, and which may be applied by means of torch, wherein the carrier of the roofing material is bituminized with modified bitumen, has a coating lying above and below the carrier, and the perforations extending therethrough having a smallest inner dimension of 50-110 mm, and preferably of about 70 mm, are so large that the upper layer can be directly applied on the roofing material by means of a torch thereby simultaneously adhering the upper layer and the bituminized carrier underlayer to the substratum, and the upper layer to the bituminized carrier underlayer itself, via the perforations only.
Claim 3
Dependent Claim
27 words
Roofing-material according to claim 1, wherein the coating of modified bitumen lying above its carrier is thicker than the coating of modified bitumen lying underneath its carrier.
Claim 4
Dependent Claim
26 words
Roofing-material according to claim 1 wherein the degree of perforation relative to the surface area of the bituminized carrier underlayer is 8-14% and preferably about 11%.
Claim 5
Dependent Claim
25 words
Roofing-material according to claim 1, wherein the same comprises bituminized perforated glass fibre mat, wherein the bitumen is modified with atactic polypropylene or styrene-butadiene-styrene co-polymer.
Claim 6
Dependent Claim
23 words
Roofing-material according to claim 1, wherein the same has the form of a strip, which has a thinned selvage at one longitudinal side.
Claim 7
Dependent Claim
158 words
Roofing-material provided with perforations and comprising a bituminized carrier with a non-sticking lower surface, said carrier being provided with bituminized perforated glass fibre mat, wherein the bitumen is modified with atactic polypropylene or styrene-butadiene-styrene copolymer, the coating of modified bitumen lying above the glass fibre mat being thicker than the coating of modified bitumen lying underneath the glass fibre mat, the roofing-material having the form of a strip, which has a thinned selvage at a longitudinal side; while the perforations have a smallest inner dimension of 50-110 mm, and preferably of about 70 mm and the degree of perforation relative to the surface area of the bituminized carrier underlayer is 8-14% and preferably about 11%, so that an upper layer can be directly applied on a substratum by means of a torch thereby simultaneously adhering the upper layer and the bituminized carrier to the substratum and the upper layer to the bituminized carrier itself, solely via the perforations.
Claim 8
Dependent Claim
158 words
Roofing-material provided with perforations and comprising a bituminized carrier with a non-sticking lower surface, said carrier being provided with bituminized perforated glass fibre mat, wherein the bitumen is modified with atactic polypropylene or styrene-butadiene-styrene copolymer, the coating of modified bitumen lying above the glass fibre mat being thicker than the coating of modified bitumen lying underneath the glass fibre mat, the roofing-material having the form of a strip, which has a thinned selvage at a longitudinal side; while the perforations have a smallest inner dimension of 50-110 mm, and preferably of about 70 mm and the degree of perforation relative to the surface area of the bituminized carrier underlayer is 8-14% and preferably about 11%, so that an upper layer can be directly applied on a substratum by means of a torch thereby simultaneously adhering the upper layer and the bituminized carrier to the substratum and the upper layer to the bituminized carrier itself, solely via the perforations.
Claim 9
Independent Claim
131 words
A method for applying roofing-material on a substratum which comprises the steps of: laying onto the substratum a plurality of adjacent roofing-material strips having a bituminized carrier underlayer of modified bitumen havaing a plurality of large perforations, of a smallest inner dimension of 50-110 mm and a degree of perforation relative to the surface area of the bituminized carrier underlayer of 8-14%, extending therethrough; covering the plurality of roofing-material strips with a waterproof upper layer containing a carrier bituminized with modified bitumen; heating the modified bitumen upper layer so that melted modified bitumen communicates with the substratum through the large perforations; and solidifying the melted modified bitumen thereby adhering simultaneously the bituminized carrier underlayer and waterproof upper layer to the substratum, and the bituminized carrier underlayer to the waterproof upper-layer itself.
Claim 10
Independent Claim
131 words
A method for applying roofing-material on a substratum which comprises the steps of: laying onto the substratum a plurality of adjacent roofing-material strips having a bituminized carrier underlayer of modified bitumen havaing a plurality of large perforations, of a smallest inner dimension of 50-110 mm and a degree of perforation relative to the surface area of the bituminized carrier underlayer of 8-14%, extending therethrough; covering the plurality of roofing-material strips with a waterproof upper layer containing a carrier bituminized with modified bitumen; heating the modified bitumen upper layer so that melted modified bitumen communicates with the substratum through the large perforations; and solidifying the melted modified bitumen thereby adhering simultaneously the bituminized carrier underlayer and waterproof upper layer to the substratum, and the bituminized carrier underlayer to the waterproof upper-layer itself.
Claim 11
Dependent Claim
37 words
The method of claim 7, wherein the step of laying a plurality of adjacent ships of roofing material further comprises overlapping a longitudinal end of a roofing-material strip with a longitudinal end of an adjacent roofing-material strip.
Claim 12
Dependent Claim
25 words
The method of claim 7, wherein the step of heating the modified bitumen upper layer comprises applying a torch to the modified bitumen upper layer.
References Cited (Backward Citations)
US4368228A
Cited
US4421807A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |