US5389121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite of layers of glass fibers of various filament diameters
Assignee: UPF Corp
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Filing: 1993-08-09
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Granted: 1995-02-14
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Expires: 2013-08-09
Abstract
Abstract The disclosure of this invention describes a composite glass fiber structure that includes first and second layers of glass fibers extending in adjacent parallel relation; synthetic resin coating the fibers of each layer and providing a bond holding the layers together in the parallel relation; the fibers of the first layer having smaller diameters than the fibers of the second layer; the first and second layers being gas compressed to have densities of between about 0.25 and 0.45 lbs. per cubic foot.
Inventors
- 👤 Jack R. Pfeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:52
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2003; B01D39/2017; B01D39/2024; B32B7/00; B32B7/02; B32B2255/00; B32B2255/02; B32B2255/26; B32B2262/00; B32B2262/10; B32B2262/101; Y; Y10; Y10S; Y10S264/00; Y10S264/48; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/25; Y10T428/252; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/67
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
132 words
A composite glass fiber structure, comprising a) first and second layers of glass fibers extending in adjacent parallel relation, b) synthetic resin coating the fibers of each layer and providing a bond holding the layers together in said parallel relation, c) the fibers of the first layer having smaller diameters than the fibers of the second layer, d) the first and second layers being gas compressed to have densities of between 0.25 and 0.45 lbs. per cubic foot, e) and including a support layer of thin, flexible, porous material extending sidewardly adjacent said first layer whereby the first layer is sandwiched between said support layer and said second layer, said support layer having a thickness between 0.002 and 0.005 inch, and a surface weight between 0.4 and 0.5 oz. per square yard.
Claim 2
Dependent Claim
132 words
A composite glass fiber structure, comprising a) first and second layers of glass fibers extending in adjacent parallel relation, b) synthetic resin coating the fibers of each layer and providing a bond holding the layers together in said parallel relation, c) the fibers of the first layer having smaller diameters than the fibers of the second layer, d) the first and second layers being gas compressed to have densities of between 0.25 and 0.45 lbs. per cubic foot, e) and including a support layer of thin, flexible, porous material extending sidewardly adjacent said first layer whereby the first layer is sandwiched between said support layer and said second layer, said support layer having a thickness between 0.002 and 0.005 inch, and a surface weight between 0.4 and 0.5 oz. per square yard.
Claim 3
Dependent Claim
17 words
The composite structure of claim 1 wherein said first layer fibers have diameters of about 0.00004 inch.
Claim 4
Dependent Claim
17 words
The composite structure of claim 1 wherein the second layer fibers have diameters of about 0.0001 inch.
Claim 5
Dependent Claim
29 words
The composite layer of claim 1 wherein the first layer fibers have diameters between 0.00002 and 0.00005 inch, and second layer fibers have diameters between 0.00006 and 0.00015 inch.
Claim 6
Dependent Claim
65 words
The composite structure of claim 1 wherein said first layer is precompressed by air flow therethrough to mat form, and the resin coating the fibers of the first layer is cured, and the second layer is compressed by air flow therethrough and through the first layer, the resin coating certain fibers of the second layer acting to bond the second layer to the first layer.
Claim 7
Dependent Claim
23 words
The composite structure of claim 1 wherein said first and second layers have particulate retention relative capacities of about 95 and 85, respectively.
Claim 8
Dependent Claim
26 words
The composite structure of claim 6 wherein each of said first and second layers has a density of between 0.25 and 0.45 lbs. per cubic foot.
Claim 9
Dependent Claim
33 words
The composite structure of claim 1 wherein said first and second layers have thicknesses t 2 and t 4 , respectively, and where t 2 is 45% to 55% of t 4 .
Claim 10
Dependent Claim
26 words
The composite structure of claim 1 wherein each of said first and second layers has a density of between 0.25 and 0.45 lbs. per cubic foot.
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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) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |