Patent US4211818A successfully refreshed from Google Patents.
US4211818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite strands of resin, carbon and glass and product formed from said strands
Assignee: PPG Industries Inc
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Filing: 1979-02-02
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Granted: 1980-07-08
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Expires: 1999-02-02
Abstract
Abstract Composite strands of resin, carbon and glass and resin sheets reinforced by glass and carbon strands are described. In the process of forming the composite strands and sheets glass strands are passed through a die as they emerge from the bath to control their resin content and wound on a mandrel. The carbon strands are passed directly into the die and are wetted by the resin in the die and on the mandrel. The composite strands of resin and glass and carbon strands are laid on the mandrel with resin to provide a fiber reinforced resin sheet.
Inventors
- 👤 Richard H. Ackley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:45
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29K; B29K2067/00; B29K2067/06; B29K2707/00; B29K2707/04; B29K2709/00; B29K2709/08; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2936; Y10T428/2938; Y10T428/2964
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
28 words
A composite strand comprising resin, a plurality of continuous glass fiber strands and at least one continuous carbon fiber strand wherein said glass and carbon strands are coextensive.
Claim 2
Dependent Claim
28 words
A composite strand comprising resin, a plurality of continuous glass fiber strands and at least one continuous carbon fiber strand wherein said glass and carbon strands are coextensive.
Claim 3
Dependent Claim
14 words
The composite strand of claim 1 wherein said resin comprises a heat curable polyester.
Claim 4
Dependent Claim
36 words
The composite strand of claim 1 wherein the carbon and glass fiber strands in said composite are between about 35 and about 98 percent by weight glass and between 65 and 2 percent by weight carbon.
Claim 5
Dependent Claim
23 words
The composite strand of claim 3 wherein said resin content is between about 20 and about 45 percent by weight of said composite.
Claim 6
Dependent Claim
25 words
The composite strand of claim 1 wherein said resin is selected from the group consisting of polyethylene, polypropylene, polyamides, polyurethanes, polyesters, epoxies and mixtures thereof.
Claim 7
Dependent Claim
18 words
The composite strand of claim 1 wherein said strand is impregnated with a resin comprising thickened uncured polyester.
Claim 8
Dependent Claim
12 words
The composite strand of claim 1 impregnated with a B-stage cured resin.
Claim 9
Dependent Claim
12 words
The strand of claim 1 wherein the strand is wound on spools.
Claim 10
Dependent Claim
37 words
The strand of claim 1 wherein the carbon and glass fiber strands in said composite comprise on a volume basis between about 50 and about 5 percent carbon and between about 5 and about 50 percent glass.
Claim 11
Dependent Claim
44 words
A fiber resin composite article comprising helically wound strands and resin wherein said helically wound strands comprise composite strands comprising resin, a plurality of continuous glass fiber strands and at least one continuous carbon fiber strand wherein said glass and carbon strands are coextensive.
Claim 12
Dependent Claim
44 words
A fiber resin composite article comprising helically wound strands and resin wherein said helically wound strands comprise composite strands comprising resin, a plurality of continuous glass fiber strands and at least one continuous carbon fiber strand wherein said glass and carbon strands are coextensive.
Claim 13
Dependent Claim
18 words
The composite of claim 10 wherein said composite was wound at a helix angle of about 85.4 degrees.
Claim 14
Dependent Claim
14 words
The composite of claim 10 wherein there are three layers of helically wound strands.
Claim 15
Dependent Claim
14 words
The composite article of claim 10 wherein said resin comprises a heat curable polyester.
Claim 16
Dependent Claim
41 words
The composite article of claim 10 wherein the carbon and glass fiber strands in said composite strands are between about 35 and about 98 percent by weight continuous glass fibers and between 65 and 2 percent by weight continuous carbon fibers.
Claim 17
Dependent Claim
18 words
The composite article of claim 10 wherein said strands are inpregnated with a resin comprising thickened uncured polyester.
Claim 18
Dependent Claim
12 words
The composite article of claim 10 impregnated with a B-stage cured resin.
Claim 19
Dependent Claim
36 words
The composite article of claim 10 wherein the carbon and glass fiber strands in said composite strands comprise on a volume basis between about 50 and about 5 percent carbon and between about 50 percent glass.
Claim 20
Dependent Claim
23 words
The composite article of claim 14 wherein said resin content is between about 20 and about 45 percent by weight of said composite.
Claim 21
Dependent Claim
25 words
The composite article of claim 10 wherein said resin is selected from the group consisting of polyethylene, polypropylene, polyamides, polyurethanes, polyesters, epoxies and mixtures thereof.
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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) | 1983-07-08 | 1984-01-07 | 1984-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-08 | 1988-01-07 | 1988-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-08 | 1992-01-07 | 1992-07-08 | $7700.00 | Window Closed / Lapsed |