US4342804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microporous bitumen coated under-roofing material
Assignee: Siplast SA
•
Filing: 1980-09-25
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Granted: 1982-08-03
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Expires: 2000-09-25
Abstract
Abstract This under-roofing material for roofs to be covered with tiles, slates and the like consists of a sheet of agglomerated fibres coated on one face with a layer of bitumen just sufficient for constituting when cooled a micro-perforated structure preventing the passage of liquid by capillarity while permitting the passage or air or vapor, this material having a strength sufficient to withstand the fall of objects or personnel during its use, and being essentially liquid-tight and pervious to air and vapors.
Inventors
- 👤 Jean-Yves Meynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:10
CPC Classifications
D; D06; D06N; D06N5/00; E; E04; E04D; E04D12/00; E04D12/002; E04D5/00; E04D5/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24421; Y10T428/2443; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249978; Y10T442/00; Y10T442/20; Y10T442/2139; Y10T442/2148
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
74 words
A water-tight and air- or air-vapor pervious under-roofing material for roofings made of discrete elements such as overlapping tiles, slates or the like, which comprises a sheet of agglomerated fibres, wherein said sheet is coated on its outer surface with a film of bitumen constituting an amount just sufficient for constituting when cooled a micro-perforated or micro-crackled structure preventing the passage of liquid by capillarity therethrough while permitting the passage of air or vapor.
Claim 2
Dependent Claim
74 words
A water-tight and air- or air-vapor pervious under-roofing material for roofings made of discrete elements such as overlapping tiles, slates or the like, which comprises a sheet of agglomerated fibres, wherein said sheet is coated on its outer surface with a film of bitumen constituting an amount just sufficient for constituting when cooled a micro-perforated or micro-crackled structure preventing the passage of liquid by capillarity therethrough while permitting the passage of air or vapor.
Claim 3
Dependent Claim
16 words
The roofing material of claim 1, wherein said fibre sheet consists of an unwoven polyester structure.
Claim 4
Dependent Claim
16 words
The roofing material of claim 1, wherein said fibre sheet consists of an unwoven polypropylene structure.
Claim 5
Dependent Claim
16 words
The roofing material of claim 1, wherein said fibre sheet consists of an unwoven polyethylene structure.
Claim 6
Dependent Claim
17 words
The roofing material of claim 1, wherein said fibre sheet consists of an unwoven polyvinyl fibre structure.
Claim 7
Dependent Claim
25 words
The roofing material of claim 1, wherein said bitumen film is protected by a roughing agent selected from the group comprising sandstone, talc and sand.
References Cited (Backward Citations)
US3756895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |