Patent US4528223A successfully refreshed from Google Patents.
US4528223A
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US
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Composite fibrous product
Assignee: Fuji Fiber Glass Co Ltd
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Filing: 1981-10-26
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Granted: 1985-07-09
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Expires: 2001-10-26
Abstract
Abstract Composite fibrous products such as composite cloth, composite strings, composite knitted goods, etc., produced by using combination yarns obtained by twisting one or more aromatic polyamide continuous filament yarns and one or more continuous glass yarns have high rigidity and excellent reinforcing effects.
Inventors
- 👤 Tetsuo Kumazawa
- 👤 Hiroaki Doi
- 👤 Yasuo Miyadera
- 👤 Atsushi Fujioka
- 👤 Tadashi Nagai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:13
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/447; D02G3/02; D02G3/04; D02G3/047; D10; D10B; D10B2101/00; D10B2101/02; D10B2101/06; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/298; Y10T442/00; Y10T442/40; Y10T442/425; Y10T442/438; Y10T442/60; Y10T442/603; Y10T442/604; Y10T442/608
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
A composite fibrous product having a great reinforcing effect and high rigidity comprising combination yarn obtained by mix-twisting aromatic polyamide continuous filament yarn and continuous glass yarn; said aromatic polyamide being selected from the group consisting of poly(p-phenylene terephthalamide), poly(p-benzamide) and copolymers of monomer units thereof.
Claim 2
Dependent Claim
46 words
A composite fibrous product having a great reinforcing effect and high rigidity comprising combination yarn obtained by mix-twisting aromatic polyamide continuous filament yarn and continuous glass yarn; said aromatic polyamide being selected from the group consisting of poly(p-phenylene terephthalamide), poly(p-benzamide) and copolymers of monomer units thereof.
Claim 3
Dependent Claim
29 words
A composite fibrous product according to claim 1, wherein said composite fibrous product is used for reinforcing plastics; the resulting fiber-reinforced plastics having increased flexural modulus and increased rigidity.
Claim 4
Dependent Claim
40 words
A composite fibrous product according to claim 1, wherein the combination yarn is obtained by a mix-twisting 30 to 95% by weight of the aromatic polyamide continuous filament yarn and 5 to 70% by weight of the continuous glass yarn.
Claim 5
Dependent Claim
41 words
A composite fibrous product according to claim 2, wherein the combination yarn used for reinforcing plastics is obtained by mix-twisting 30 to 95% by weight of aromatic polyamide continuous filament yarn and 5 to 70% by weight of continuous glass yarn.
Claim 6
Dependent Claim
26 words
A composite fibrous product according to claim 1, 3 or 4, wherein the combination yarn has the number of twist of 1 to 15 turns/25 mm.
Claim 7
Dependent Claim
25 words
A composite fibrous product according to claim 1, 3 or 4, wherein the combination yarn has a thickness of 10 to 150 tex (g/1,000 m).
Claim 8
Dependent Claim
23 words
A composite fibrous product according to claim 1, 3 or 4, wherein the aromatic polyamide continuous filament yarn is poly(p-phenyleneterephthalamide) continuous filament yarn.
Claim 9
Dependent Claim
23 words
A composite fibrous product according to claim 1, 3 or 4, wherein the aromatic polyamide continuous filament yarn is poly(p-benzamide) continuous filament yarn.
Claim 10
Dependent Claim
16 words
A composite fibrous product according to claim 1, wherein said composite fibrous product is composite cloth.
Claim 11
Dependent Claim
28 words
A composite fibrous product according to claim 1, 3 or 4, wherein the continuous glass yarn is sized with a sizing agent having affinity to an impregnating resin.
Claim 12
Dependent Claim
17 words
A composite fibrous product according to claim 1, wherein said composite fibrous product is a composite string.
Claim 13
Dependent Claim
18 words
A composite fibrous product according to claim 1, wherein said composite fibrous product is a composited knitted good.
Claim 14
Dependent Claim
17 words
A composite fibrous product according to claim 1, wherein said composite fibrous product is a composite sleeve.
References Cited (Backward Citations)
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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) | 1988-07-08 | 1989-01-07 | 1989-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-08 | 1993-01-07 | 1993-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-08 | 1997-01-07 | 1997-07-09 | $7700.00 | Window Closed / Lapsed |