US4752513A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcements for pultruding resin reinforced products and novel pultruded products
Assignee: PPG Industries Inc
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Filing: 1987-07-17
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Granted: 1988-06-21
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Expires: 2007-07-17
Abstract
Abstract Novel resin reinforcing composite mats of continuous strands are described for use in pultrusion processes. The pultruded parts are characterized by having a reinforcement of mats and rovings with the reinforcing mats and rovings being distributed throughout the parts.
Inventors
- 👤 Robert B. Rau
- 👤 Walter J. Reese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
B; B29; B29D; B29D99/00; B29D99/0003; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/083; B29C70/085; B29C70/28; B29C70/40; B29C70/50; B29C70/52; B29C70/525; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395; Y10T428/23979
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
81 words
A pultruded fiber reinforced resin article of manufacture having as the fiber reinforcement a plurality of resin impregnated fiber strands placed in spaced relationship to each other and running parallel to each other and at least one axis of the article, at least two resin impregnated reinforcement mats positioned on opposite sides of said strands, each of said mats having a spiked surface and wherein the mats are positioned such that the spiked surface of each mat faces the fiber strands
Claim 2
Dependent Claim
81 words
A pultruded fiber reinforced resin article of manufacture having as the fiber reinforcement a plurality of resin impregnated fiber strands placed in spaced relationship to each other and running parallel to each other and at least one axis of the article, at least two resin impregnated reinforcement mats positioned on opposite sides of said strands, each of said mats having a spiked surface and wherein the mats are positioned such that the spiked surface of each mat faces the fiber strands
Claim 3
Dependent Claim
22 words
The pultruded fiber reinforced article of claim 1, wherein the spikes and the fiber strands are in intimate contact with each other.
Claim 4
Dependent Claim
24 words
The pultruded fiber reinforced article of claim 1, wherein the fiber strands are glass fiber strands and the reinforcement mats are glass fiber mats.
Claim 5
Dependent Claim
28 words
The pultruded fiber reinforced resin article of claim 1, wherein the fiber strands are glass fibers, the mats are composite needled mats of synthetic fibers and glass fibers.
Claim 6
Dependent Claim
20 words
The pultruded fiber reinforced resin article of claim 4, wherein the spikes are in intimate contact with said glass fibers.
Claim 7
Dependent Claim
12 words
The article of claim 5, wherein the resin is a polyester resin.
Claim 8
Dependent Claim
12 words
The article of claim 5, wherein the resin is a thermoset resin.
Claim 9
Dependent Claim
11 words
The article of claim 7, wherein the resin contains a filler.
Claim 10
Dependent Claim
11 words
The article of claim 5, wherein the resin contains a filler.
Claim 11
Dependent Claim
12 words
The article of claim 4, wherein the resin is a polyester resin.
Claim 12
Dependent Claim
12 words
The article of claim 4, wherein the resin is a thermoset resin.
Claim 13
Dependent Claim
11 words
The article of claim 11, wherein the resin contains a filler.
Claim 14
Dependent Claim
11 words
The article of claim 4, wherein the resin contains a filler.
Claim 15
Dependent Claim
12 words
The article of claim 1 wherein the resin is a thermoplastic resin.
Claim 16
Dependent Claim
57 words
A pultruded fiber reinforced resin article of manufacture having as the fiber reinforcement a plurality of resin impregnated fiber strands placed in spaced relationship to each other and running parallel to each other and at least one axis of the article and having at least two resin impregnated reinforcement mats positioned on opposite sides of said strands.
Claim 17
Dependent Claim
57 words
A pultruded fiber reinforced resin article of manufacture having as the fiber reinforcement a plurality of resin impregnated fiber strands placed in spaced relationship to each other and running parallel to each other and at least one axis of the article and having at least two resin impregnated reinforcement mats positioned on opposite sides of said strands.
Claim 18
Dependent Claim
24 words
The pultruded fiber reinforced article of claim 15, wherein the fiber strands are glass fiber strands and the reinforcement mats are glass fiber mats.
Claim 19
Dependent Claim
12 words
The article of claim 16, wherein the resin is a polyester resin.
Claim 20
Dependent Claim
11 words
The article of claim 17, wherein the resin contains a filler.
Claim 21
Dependent Claim
12 words
The article of claim 16, wherein the resin is a thermoset resin.
Claim 22
Dependent Claim
11 words
The article of claim 19, wherein the resin contains a filler.
Claim 23
Dependent Claim
29 words
The pultruded fiber reinforced resin article of claim 15, wherein the fiber strands are glass fibers and the mats are composite needled mats of synthetic fibers and glass fibers.
Claim 24
Dependent Claim
12 words
The article of claim 21, wherein the resin is a polyester resin.
Claim 25
Dependent Claim
11 words
The article of claim 22, wherein the resin contains a filler.
Claim 26
Dependent Claim
12 words
The article of claim 21, wherein the resin is a thermoset resin.
Claim 27
Dependent Claim
11 words
The article of claim 24, wherein the resin contains a filler.
Claim 28
Dependent Claim
12 words
The article of claim 15 wherein the resin is a thermoplastic resin.
Claim 29
Dependent Claim
66 words
A fiber containing reinforcing mat comprising a first mat of strands in the form of a scrim cloth having at least four holes per square inch therein, a second mat of continuous strands coextensive with said first mat, said first mat and said second mat being mechanically bonded together by needling to provide a spiked major surface and non-spiked major surface on the resulting reinforcing mat.
Claim 30
Dependent Claim
66 words
A fiber containing reinforcing mat comprising a first mat of strands in the form of a scrim cloth having at least four holes per square inch therein, a second mat of continuous strands coextensive with said first mat, said first mat and said second mat being mechanically bonded together by needling to provide a spiked major surface and non-spiked major surface on the resulting reinforcing mat.
Claim 31
Dependent Claim
17 words
The mat of claim 1, wherein said second mat is a mat of continuous glass fiber strands.
Claim 32
Dependent Claim
14 words
The mat of claim 28, wherein said first mat is made of synthetic fibers.
Claim 33
Dependent Claim
14 words
The mat of claim 28, wherein said first mat is made of natural fibers.
Claim 34
Dependent Claim
14 words
The mat of claim 28, wherein said first mat is made of glass fibers.
Claim 35
Dependent Claim
54 words
A fiber containing reinforcing mat comprising a first mat of strands in the form of a scrim cloth having at least four holes per square inch therein, a second mat of continuous strands substantially coextensive with said first mat, said first and second mats being bonded together by needling to provide an integral mat.
Claim 36
Dependent Claim
54 words
A fiber containing reinforcing mat comprising a first mat of strands in the form of a scrim cloth having at least four holes per square inch therein, a second mat of continuous strands substantially coextensive with said first mat, said first and second mats being bonded together by needling to provide an integral mat.
Claim 37
Dependent Claim
16 words
The mat of claim 32 wherein said first and second mats are made of glass fibers.
Claim 38
Dependent Claim
12 words
The article of claim 32 wherein the resin is a thermoplastic resin.
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) | 1991-06-21 | 1991-12-21 | 1992-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-21 | 1995-12-21 | 1996-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-21 | 1999-12-21 | 2000-06-21 | $7700.00 | Window Closed / Lapsed |