US4892780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber reinforcement for resin composites
Assignee: Individual
•
Filing: 1987-07-16
•
Granted: 1990-01-09
•
Expires: 2007-07-16
Abstract
Abstract A fiber reinforcement for resin-impregnated fiber composites wherein the reinforcement comprises a fibrous substrate having staple fiber applied to one or both sides by mechanical entanglement.
Inventors
- 👤 William H. Cochran
- 👤 Brian P. Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:40
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/06; B32B3/00; B32B3/02; B32B3/06; D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; B32B2260/00; B32B2260/02; B32B2260/021; B32B2262/00; B32B2262/02; B32B2262/0246; B32B2262/0253; B32B2307/00; B32B2307/50; B32B2307/542; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T442/00; Y10T442/30; Y10T442/3472; Y10T442/348; Y10T442/3496; Y10T442/40; Y10T442/488; Y10T442/60; Y10T442/659; Y10T442/66; Y10T442/662
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A resin-impregnated fiber composite comprising a laminate of fibrous substrates each having staple fiber applied to one or both sides by mechanical entanglement, the substrates being impregnated with resin and the laminate being cured whereby the composite is characterized by improved interlaminar shear strength through the interlocking effect of the staple fibers applied by mechanical entanglement.
Claim 2
Dependent Claim
56 words
A resin-impregnated fiber composite comprising a laminate of fibrous substrates each having staple fiber applied to one or both sides by mechanical entanglement, the substrates being impregnated with resin and the laminate being cured whereby the composite is characterized by improved interlaminar shear strength through the interlocking effect of the staple fibers applied by mechanical entanglement.
Claim 3
Dependent Claim
18 words
The composite of claim 1 wherein the staple fiber is applied to the fibrous substrates by needle punching.
Claim 4
Dependent Claim
26 words
The composite of claim 2 wherein the staple fiber is an acrylic staple and the fibrous substrates are high molecular weight, high modulus, highly oriented polyethylene.
Claim 5
Dependent Claim
10 words
The composite of claim 3 wherein the substrates are woven.
Claim 6
Dependent Claim
13 words
The composite of claim 1 wherein the substrates are woven, knitted or nonwoven.
Claim 7
Dependent Claim
9 words
A composite according to claim 1 which is rigid.
Claim 8
Dependent Claim
33 words
A composite according to claim 1 wherein the substrates comprise knitted or woven high molecular weight, high modulus, highly oriented polyethylene having acrylic staple applied to one or both surfaces by needle punching.
Claim 9
Dependent Claim
17 words
A composite according to claim 1 wherein the substrates are layered together before being impregnated and cured.
Claim 10
Dependent Claim
17 words
A composite according to claim 1 wherein the substrates are pre-impregnated and then layered together and cured.
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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) | 1993-01-08 | 1993-07-10 | 1994-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-08 | 1997-07-10 | 1998-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-08 | 2001-07-10 | 2002-01-09 | $7700.00 | Window Closed / Lapsed |