US4759964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural panel
Assignee: Fischer Advanced Composite Components AG
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Filing: 1986-09-09
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Granted: 1988-07-26
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Expires: 2006-09-09
Abstract
Abstract A structural panel in the form of a sandwich construction, comprises a core and at least one cover layer on at least one external surface of the core. Said cover layer itself has on its external surface at least a first layer of fibrous material and has on its internal surface at least a second layer having a high melting point and a high combustion temperature and also being gas-tight, thereby preventing hot gases from passing through the layer and then burning the layer disposed therebelow.
Inventors
- 👤 Josef Fischer
- 👤 Walter A. Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:25
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/14; B32B15/20; B32B27/00; B32B27/38; B32B27/42; B32B3/00; B32B3/10; B32B3/12; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/30; E04C2/34; E04C2/36; E04C2/365; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2311/00; B32B2311/24; B32B2361/00; B32B2363/00; B32B2471/00; B32B2605/00; B32B2605/18; B32B2607/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24802; Y10T428/24917; Y10T428/25; Y10T428/253
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A structural panel in the form of a sandwich construction, comprising a core and at least one cover layer on the exterior of the core, wherein said cover layer has at least a first layer of fibrous material on its external surface and at least a second layer being thinner than 0.1 mm and being disposed between the first layer and the core, the second layer having a high melting point and a high combustion temperature, the first layer providing, in the event of a fire, a gas insulating layer and wherein the panel includes a third layer of fibers or fiber-reinforced material disposed between the cover layer and the core.
Claim 2
Dependent Claim
111 words
A structural panel in the form of a sandwich construction, comprising a core and at least one cover layer on the exterior of the core, wherein said cover layer has at least a first layer of fibrous material on its external surface and at least a second layer being thinner than 0.1 mm and being disposed between the first layer and the core, the second layer having a high melting point and a high combustion temperature, the first layer providing, in the event of a fire, a gas insulating layer and wherein the panel includes a third layer of fibers or fiber-reinforced material disposed between the cover layer and the core.
Claim 3
Dependent Claim
16 words
A structural panel as recited in claim 1, wherein said second layer is formed from metal.
Claim 4
Dependent Claim
16 words
A structural panel as recited in claim 2, wherein said second layer is formed from aluminum.
Claim 5
Dependent Claim
29 words
A structural panel as recited in claim 1, wherein said core has a cellular structure, the walls of the cells extending substantially perpendicular to the surface of the panel.
Claim 6
Dependent Claim
27 words
A structural panel as recited in claim 1, wherein said second layer is disposed directly below said first layer, and said first layer is a surface laminate.
Claim 7
Dependent Claim
18 words
A structural panel as recited in claim 1, wherein said first layer is impregnated with a flame-retardant resin.
Claim 8
Dependent Claim
18 words
A structural panel as recited in claim 6, wherein the resin is based on epoxy or phenol resin.
Claim 9
Dependent Claim
16 words
A structural panel as recited in claim 1, wherein said second layer is impermeable to gas.
Claim 10
Dependent Claim
35 words
A structural panel as recited in claim 8, wherein said first layer is joined to said second layer by phenol resin, and said second layer is joined to a layer situated therebelow by epoxy resin.
References Cited (Backward Citations)
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Cited
CH193983A
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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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |