US4024310A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-08-18
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Granted: 1977-05-17
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Expires: 1995-08-18
Abstract
Abstract A laminated panel having improved fire resistance comprising a core of rigid isocyanurate based foam sandwiched between two facing sheets, characterized in that at least one of the facing sheets has an adherent layer of intumescent material applied to its inner surface; the whole being bonded together by the foam core into a unitary construction. In a further embodiment of the invention there is embedded within the foam core a binding material.
Inventors
- 👤 Alan Metcalf Wooler
- 👤 Dennis Charlton Allport
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:04
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/046; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/941; E04B1/942; B32B5/00; B32B5/18; B32B5/20; B32B7/00; B32B7/04; B32B7/12; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; B32B2305/00; B32B2305/08; B32B2305/38; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2607/00; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/902; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31547; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/188; Y10T442/60; Y10T442/647; Y10T442/651; Y10T442/652
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A laminated panel comprising a core of rigid isocyanurate-based foam sandwiched between two facing sheets, characterized in that at least one of the facing sheets has an adherent layer of intumescent material applied to its inner surface and in that there is embedded in one or both outer surfaces of the foam core a wire mesh binding material such that it touches one or both inner surfaces of the facing sheets; the whole being bonded together by the foam core into a unitary construction.
Claim 2
Dependent Claim
84 words
A laminated panel comprising a core of rigid isocyanurate-based foam sandwiched between two facing sheets, characterized in that at least one of the facing sheets has an adherent layer of intumescent material applied to its inner surface and in that there is embedded in one or both outer surfaces of the foam core a wire mesh binding material such that it touches one or both inner surfaces of the facing sheets; the whole being bonded together by the foam core into a unitary construction.
Claim 3
Dependent Claim
19 words
A laminated panel as claimed in 1 wherein at least one facing sheet is made from a non-combustible material.
Claim 4
Dependent Claim
15 words
A laminated panel as claimed in claim 2 wherein the non-combustible material is sheet metal.
Claim 5
Dependent Claim
40 words
A laminated panel as claimed in claim 1 wherein the intumescent material is a sodium silicate of the general formula: Na.sub.2 O(SiO.sub.2).sub.x (H.sub.2 O).sub.y wherein x is 0.5 to 5 and y is the number of molecules of water present.
Claim 6
Dependent Claim
28 words
A laminated panel as claimed in claim 4 wherein x is 2.9 to 3.9. 6. A laminated panel as claimed in claim 1 wherein a reinforcing material is
Claim 7
Dependent Claim
23 words
incorporated in the intumescent material. 7. A laminated panel as claimed in claim 6 wherein the reinforcing material is a coarse, glass mat
Claim 8
Dependent Claim
22 words
weighing between 250 and 500 gm/sq.m. 8. A laminated panel as claimed in claim 1 wherein the wire mesh is chicken wire.
References Cited (Backward Citations)
US3068043A
Cited
US3466222A
Cited
US3647608A
Cited
US3644168A
Cited
US3814659A
Cited
US3903346A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |