US4439472A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Upholstery components
Assignee: Dunlop Ltd
•
Filing: 1981-10-05
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Granted: 1984-03-27
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Expires: 2001-10-05
Abstract
Abstract A flame-retardant upholstery component consists of a core of a polyurethane foam, which foam collapses on application of a flame thereto, said core being covered with a layer of a foam material which has been impregnated with a flame-retardant substance.
Inventors
- 👤 Raymond W. H. Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:48
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; A; A47; A47C; A47C31/00; A47C31/001; C; C08; C08J; C08J9/00; C08J9/36; C08J9/40; C08J9/42; B32B2375/00; C08J2375/00; C08J2375/04; C08J2421/00; Y; Y10; Y10S; Y10S297/00; Y10S297/05; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249994; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
80 words
An upholstery component which retards smouldering, comprising: an unimpregnated core made of flame-collapsible polyurethane foam which collapses on application of a flame thereto, thereby presenting a reduced surface area of the flame without sustained burning; and a layer of a non-flame-collapsible foam material wrapped about said core, said layer having been impregnated with a flame-retardant substance, said substance being a suspension of a hydrated alumina in a latex, whereby said layer and said core cooperate to produce said upholstery component.
Claim 2
Dependent Claim
80 words
An upholstery component which retards smouldering, comprising: an unimpregnated core made of flame-collapsible polyurethane foam which collapses on application of a flame thereto, thereby presenting a reduced surface area of the flame without sustained burning; and a layer of a non-flame-collapsible foam material wrapped about said core, said layer having been impregnated with a flame-retardant substance, said substance being a suspension of a hydrated alumina in a latex, whereby said layer and said core cooperate to produce said upholstery component.
Claim 3
Dependent Claim
40 words
The component of claim 1, wherein said polyurethane foam core is made from a foam which is the reaction product of a polymeric polyol, a tolylene di-isocyanate, a foam modifier, an anti-ageing additive and an anti-shrinkage agent for the foam.
Claim 4
Dependent Claim
15 words
The component of claim 1, wherein said core is made of a "high-resilience" foam polyurethane.
Claim 5
Dependent Claim
15 words
The component of claim 1, wherein said foam-covered core is enclosed in a fabric casing.
Claim 6
Dependent Claim
17 words
The component of claim 4, wherein said fabric casing has itself been treated with a flame-retardant substance.
References Cited (Backward Citations)
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US3803064A
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GB1519795A
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US4092752A
Cited
US4224374A
Cited
US4254177A
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |