US5088249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roof covering or wall covering
Assignee: ROLAND-WERKE DACHBAUSTOFFE und BAUCHEMIE ZEPPELINSTRASSE 1 D - 2807 CHIM WEST GERMANY A GERMAN CORP
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Filing: 1989-04-19
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Granted: 1992-02-18
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Expires: 2009-04-19
Abstract
Abstract A roof covering or wall covering for a building or the like comprising a supporting layer having open channels, preferably made of corrugated metal sheet. Encasing structures, filled with a fire-retarding substance, are located in the channels of the supporting layer. The fire-retarding substance is a thickened liquid. Since the liquid is thickened, it cannot escape or can escape only very slowly from leaky points in the supporting layer in the event of fire. This ensures an evaporation of the fire-retarding liquid to remove the thermoenergy produced during the fire.
Inventors
- 👤 Taieb Marzouki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:09
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; E04D3/352; A; A62; A62C; A62C35/00; A62C35/02; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04D13/00; E04D13/16; E04D13/1606; E04D13/1643; E04D3/354; E04F; E04F13/00; E04F13/07; E04F13/08; E04F13/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
72 words
A roof covering or wall covering for a building comprising a supporting layer (11), having open channels, made of corrugated metal sheet (17), and encasing structures arranged in said channels (18), said encasing structures being formed as tubes or cushions sealed in a gas-tight manner and formed from a plastic laminate having at least two layers, and said encasing structures filled with a fire-retarding substance, said fire-retarding substance being a thickened liquid.
Claim 2
Dependent Claim
72 words
A roof covering or wall covering for a building comprising a supporting layer (11), having open channels, made of corrugated metal sheet (17), and encasing structures arranged in said channels (18), said encasing structures being formed as tubes or cushions sealed in a gas-tight manner and formed from a plastic laminate having at least two layers, and said encasing structures filled with a fire-retarding substance, said fire-retarding substance being a thickened liquid.
Claim 3
Dependent Claim
28 words
Roof covering or wall covering according to claim 1, characterized in that the fire-retarding liquid is water (21) thickened by a thickening agent which is an organic substance.
Claim 4
Dependent Claim
35 words
Roof covering or wall covering according to claim 2, characterized in that the thickening agent is cellulose ether, in particular methyl cellulose with a concentration of 1 to 5% by weight, preferably 3% by weight.
Claim 5
Dependent Claim
40 words
Roof covering or wall covering according to claim 2, characterized in that the thickening agent is a neutralized acrylic acid polymer or copolymer, in particular polyacrylic acid with a concentration of 0.05 to 1% by weight, preferably 0.25% by weight.
Claim 6
Dependent Claim
43 words
Roof covering or wall covering according to claim claims 3 or 4, characterized in that a preservative, in particular isothiazolynones, methyl p-hydroxybenzoate, ethyl p-hydroxybenzoate, methyl p-hydroxybenzoate, propyl p-hydroxybenzoate, benzoic acid, sodium benzoate, sorbic acid or potassium sorbate is added to the thickening agent.
Claim 7
Dependent Claim
26 words
Roof covering or wall covering according to claim 1, wherein said tubes (19) or cushions (23) are formed from a polyethylene modified with ethylene-vinyl acetate copolymer.
Claim 8
Dependent Claim
27 words
Roof covering or wall covering according to claim 1, characterized in that the flexible tube (19) or cushions (23) are formed from a three-layer polyester aluminum/polystyrene laminate.
Claim 9
Dependent Claim
35 words
Roof covering or wall covering according to claim 1, characterized in that the flexible tubes (19) are closed by welding at their oppositely situated end faces, preferably by a fin weld (22) in each case.
Claim 10
Dependent Claim
24 words
Roof covering or wall covering according to claim 1, characterized in that the cushions (23) are formed from blanks (24, 25) welded all round.
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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) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |