US4543288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibre reinforced plastics sheets
Assignee: Wiggins Teape Group Ltd
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Filing: 1985-01-04
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Granted: 1985-09-24
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Expires: 2005-01-04
Abstract
Abstract A solid fibre reinforced plastics material sheet comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), a substantial proportion of the fibers being between 7 and 50 millimeters long and 13 microns or less in diameter, and 40% to 80% by weight of a thermoplastics material.
Inventors
- 👤 Bronislaw Radvan
- 👤 William T. H. Skelding
- 👤 Anthony J. Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:29
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C67/00; B29C67/20; B29C70/16; B29C70/18; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29D; B29D99/00; B29D99/001; B29D99/0014; B29K; B29K2105/00; B29K2105/06; B29K2105/12; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/903; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
55 words
A solid fibre reinforced plastics material sheet comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), a substantial proportion of the fibres being between 7 and 50 millimeters long and 13 microns or less in diameter, and 40% to 80% by weight of a thermoplastics material.
Claim 2
Dependent Claim
55 words
A solid fibre reinforced plastics material sheet comprising 20% to 60% by weight of reinforcing fibres having a high modulus of elasticity (as herein defined), a substantial proportion of the fibres being between 7 and 50 millimeters long and 13 microns or less in diameter, and 40% to 80% by weight of a thermoplastics material.
Claim 3
Dependent Claim
25 words
A solid fibre reinforced plastics material sheet as claimed in claim 1 in which the fibres are in the form of single discrete glass fibres.
Claim 4
Dependent Claim
19 words
A solid fibre reinforced plastics material sheet as claimed in claim 1 in which the plastics material is thermoplastic.
Claim 5
Dependent Claim
35 words
A solid fibre reinforced plastics material sheet as claimed in claim 3 in which the thermoplastics material is selected from the group consisting of polyethylene, polypropylene, polystyrene, acrilonitrylstyrenebutadiene, polyethyleneterephthalate and polyvinylchloride, both plasticised and unplasticised.
Claim 6
Dependent Claim
22 words
A solid fibre reinforced plastics material sheet as claimed in claim 1 in which the plastics material is a postformable thermosetting material.
Claim 7
Dependent Claim
19 words
A solid fibre reinforced plastics material sheet as claimed in claim 3 in which the plastics material is thermoplastic.
Claim 8
Dependent Claim
22 words
A solid fibre reinforced plastics material sheet as claimed in claim 2 in which the plastics material is a post-formable thermosetting material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |