Patent US4690860A successfully refreshed from Google Patents.
US4690860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibre reinforced composite plastics material
Assignee: Wiggins Teape Group Ltd
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Filing: 1986-12-29
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Granted: 1987-09-01
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Expires: 2006-12-29
Abstract
Abstract A fibre reinforced plastics structure comprising a porous matrix of thermoplastics material and reinforcing fibres, the pores of said matrix being wholly or partly invested with a thermosetting plastics material.
Inventors
- 👤 Bronislaw Radvan
- 👤 Andrew Till
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:49
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/18; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/105; B29C67/00; B29C67/20; B29C70/12; B29C70/16; B29C70/18; B29C70/28; B29C70/40; B29C70/42; B27; B27N; B27N3/00; B27N3/04; B29K; B29K2101/00; B29K2101/10; B29K2105/00; B29K2105/04; B29K2105/045; B29K2105/06; B29K2105/12; B29K2105/16; B29K2995/00; B29K2995/0018; B29K2995/0022; B29K2995/0037; B29K2995/0065; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249953; Y10T428/249955; Y10T428/249956; Y10T428/249986; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/273
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A fibre reinforced plastics structure, comprising: a porous matrix comprising 40% to 60% by weight of thermoplastic material and 20% to 60% by weight of single reinforcing fibres having a high modulus of elasticity, and being between about 7 and 50 millimeters long, the matrix having pores and a surface; and a cured thermoset plastics material investing at least the pores at the surface of said matrix.
Claim 2
Dependent Claim
67 words
A fibre reinforced plastics structure, comprising: a porous matrix comprising 40% to 60% by weight of thermoplastic material and 20% to 60% by weight of single reinforcing fibres having a high modulus of elasticity, and being between about 7 and 50 millimeters long, the matrix having pores and a surface; and a cured thermoset plastics material investing at least the pores at the surface of said matrix.
Claim 3
Dependent Claim
31 words
A fibre reinforced plastics structure as claimed in claim 1 in which the thermoplastic material of the matrix is in a substantially unconsolidated form and is bonded to the reinforcing fibres.
Claim 4
Dependent Claim
21 words
A fibre reinforced plastics structure as claimed in claim 1 in which the matrix is wholly invested with thermoset plastics material.
Claim 5
Dependent Claim
24 words
A fibre reinforced plastics structure as claimed in claim 1 in which a surface layer of thermoset plastics material is provided on said surface.
Claim 6
Dependent Claim
23 words
A fibre reinforced plastics structure as claimed in claim 1 further comprising a film adhered to said surface by said thermoset plastics material.
Claim 7
Dependent Claim
17 words
A fibre reinforced plastics structure as claimed in claim 1 wherein the reinforcing fibres are glass fibres.
Claim 8
Independent Claim
78 words
A method of making a fibre reinforced plastics structure, comprising the steps of: forming a porous matrix comprising 40% to 60% by weight of thermoplastic material and 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity, and being between about 7 and about 50 millimeters long, the matrix having a surface and pores; investing the pores of said structure, at least at the surface thereof, with liquid thermosetting resin; and curing said resin.
Claim 9
Independent Claim
78 words
A method of making a fibre reinforced plastics structure, comprising the steps of: forming a porous matrix comprising 40% to 60% by weight of thermoplastic material and 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity, and being between about 7 and about 50 millimeters long, the matrix having a surface and pores; investing the pores of said structure, at least at the surface thereof, with liquid thermosetting resin; and curing said resin.
Claim 10
Dependent Claim
55 words
A method of making a fibre reinforced plastics structure as clamed in claim 7 in which the porous matrix is formed from a fibre reinforced thermoplastics material which has been consolidated by heating and cooling under pressure and then reheated to cause the resilience of the fibres to re-expand it and render the sheet porous.
Claim 11
Dependent Claim
42 words
A method of making a fibre reinforced plastics structure as claimed in claim 7 in which the porous material is invested with a liquid thermosetting resin which cures at a temperature below the softening temperature of the thermoplastic component of the material.
Claim 12
Dependent Claim
47 words
A method of making a fibre reinforced plastics structure as claimed in claim 7 in which, prior to curing of the thermosetting resin, the porous matrix is heated to the moulding temperature of the thermoplastics component, transferred to a moulding press and pressed into a desired shape.
Claim 13
Dependent Claim
33 words
A method of making a fibre reinforced plastics structure as claimed in claim 7 in which the thermosetting liquid resin is carried on a film or sheet which is applied to the matrix.
Claim 14
Dependent Claim
23 words
A method of making a fibre reinforced plastics structure as claimed in claim 11 in which the matrix is then heated and moulded.
Claim 15
Dependent Claim
29 words
A method of making a fibre reinforced plastics structure as claimed in claim 11 in which the liquid thermosetting resin is partly gelled or is a high viscosity resin.
References Cited (Backward Citations)
GB843154A
Cited
US3172072A
Cited
DE1504828A1
Cited
GB1008833A
Cited
GB1113792A
Cited
GB1110659A
Cited
GB1129757A
Cited
US3975483A
Cited
GB1306145A
Cited
US3621092A
Cited
US3617594A
Cited
GB1263812A
Cited
GB1348896A
Cited
US3734985A
Cited
GB1329409A
Cited
US4273981A
Cited
US4498957A
Cited
US4386943A
Cited
GB2065016A
Cited
US4508777A
Cited
US4362778A
Cited
GB2096195A
Cited
US4426470A
Cited
US4481248A
Cited
US4496623A
Cited
US4440819A
Cited
US4543288A
Cited
US4543288B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |