US4585683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structural panel
Assignee: BRISTOL CMPOSITE MATERIALS ENGINEERING Ltd
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Filing: 1984-11-29
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Granted: 1986-04-29
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Expires: 2004-11-29
Abstract
Abstract A structural panel having a core of a phenolic foam plastics material surrounded by a woven fibre cloth impregnated with a phenolic resin. In the case of large panels, internal stiffeners may be used to improve the structural rigidity. Also the panels may have an armour layer to give the panel bullet and fire resisting properties. The armour layer may be external or internal to the panel and may be for example an alumina or a ceramic tile.
Inventors
- 👤 Richard D. Curnow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:26
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/245; B32B15/00; B32B15/04; B32B15/046; B32B19/00; B32B19/04; B32B19/047; B32B19/06; B32B5/02; B32B5/024; B32B5/18; B32B9/00; B32B9/005; B32B9/04; B32B9/046; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2262/00; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2571/00; B32B2571/02; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/239; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/24999; Y10T428/249991
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
Structural panel comprising (a) a central layer of an armour material (b) said central layer being bonded between layers of a phenolic foam plastics material (c) said phenolic foam plastics material having internal stiffeners so as to increase the rigidity of the panel and (d) a woven fibre cloth impregnated with a phenolic resin, said woven fibre cloth surrounding a major part of the surface of the foam plastics material.
Claim 2
Dependent Claim
70 words
Structural panel comprising (a) a central layer of an armour material (b) said central layer being bonded between layers of a phenolic foam plastics material (c) said phenolic foam plastics material having internal stiffeners so as to increase the rigidity of the panel and (d) a woven fibre cloth impregnated with a phenolic resin, said woven fibre cloth surrounding a major part of the surface of the foam plastics material.
Claim 3
Dependent Claim
15 words
Structural panel according to claim 1 in which the woven fibre cloth is fibre glass.
Claim 4
Dependent Claim
32 words
Structural panel according to claim 1 or claim 2 in which a plurality of layers of the woven fibre cloth and resin are laid up and placed together to form a laminate.
Claim 5
Dependent Claim
20 words
Structural panel according to claim 1 in which the internal stiffeners are in a staggered arrangement relative to each other.
Claim 6
Dependent Claim
16 words
Structural panel according to claim 1 in which the armour material comprises alumina or ceramic tiles.
References Cited (Backward Citations)
US3536575A
Cited
US3671355A
Cited
US3785913A
Cited
US3813281A
Cited
FR2391334A1
Cited
US4361613A
Cited
US4476183A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |