Patent US4500593A successfully refreshed from Google Patents.
US4500593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective fabric and fire curtain with a metallic laminate
Assignee: Individual
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Filing: 1983-08-22
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Granted: 1985-02-19
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Expires: 2003-08-22
Abstract
Abstract A fire retardant which is suitable for use as a protective material in garments, clothing, fire curtains, barriers or screens is disclosed. The fabric employs an amorphous silica core having a minimum of 96% silica by chemical analysis. The core fiber is encapsulated in a wrapping or covering which may be of polybenzimidazole, aramids, blends of aramids with other fibers and/or polyacrylonitrile fibers or blends thereof. The core fiber and wrapping comprise a heat resistant yarn which may be woven into a heat resistant fabric which may then be aluminized on one or both sides thereof.
Inventors
- 👤 John W. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:05
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; A; A41; A41D; A41D31/00; A41D31/04; A41D31/08; A41D31/085; B32B5/00; B32B5/02; B32B5/024; D; D02; D02G; D02G3/00; D02G3/44; D02G3/443; B32B2262/00; B32B2262/02; B32B2262/0246; B32B2262/0261; B32B2262/0269; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/718; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/92; Y10S57/00; Y10S57/904; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2936; Y10T428/2964; Y10T428/2967; Y10T428/31504; Y10T428/31678; Y10T442/00; Y10T442/30; Y10T442/3146; Y10T442/3154; Y10T442/3382; Y10T442/3415
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
44 words
A high temperature resistant fabric comprised of yarns, having a core of high temperature resistant refractory material silica and covering of a second high temperature resistant fiber selected from the group consisting essentially of aramid, phenolic, polyacrylonitrile and polybenzimidazole fibers, and a metallic laminate.
Claim 2
Dependent Claim
44 words
A high temperature resistant fabric comprised of yarns, having a core of high temperature resistant refractory material silica and covering of a second high temperature resistant fiber selected from the group consisting essentially of aramid, phenolic, polyacrylonitrile and polybenzimidazole fibers, and a metallic laminate.
Claim 3
Dependent Claim
23 words
The fabric of claim 1 wherein: said second fiber has greater abrasion resistance than said core and comprises at least 45% by weight.
Claim 4
Dependent Claim
24 words
The fabric of claim 1 wherein: said fabric is woven in a herringbone repeat pattern and has a maximum theoretical cover factor of 1.
Claim 5
Dependent Claim
23 words
The fabric of claim 1 wherein: said fabric is woven in a herringbone repeat pattern and has a theoretical cover factor of 0.92%.
Claim 6
Dependent Claim
15 words
The fabric of claim 4 wherein: said core is proportionally greater than 50% by weight.
Claim 7
Dependent Claim
15 words
The fabric of claim 4 wherein: said core is proportionally greater than 53% by weight.
Claim 8
Dependent Claim
37 words
A high temperature resistant fabric comprised of composite yarns, each yarn further comprised essentially of a core of high temperature silica having the thermal performance of refractory material and a covering of polybenzimidazole, and a metallic laminate.
Claim 9
Dependent Claim
37 words
A high temperature resistant fabric comprised of composite yarns, each yarn further comprised essentially of a core of high temperature silica having the thermal performance of refractory material and a covering of polybenzimidazole, and a metallic laminate.
Claim 10
Dependent Claim
13 words
The fabric of claim 7 wherein: said core is at least 96% silica.
Claim 11
Dependent Claim
13 words
The fabric of claim 7 wherein: said core is at least 97% silica.
Claim 12
Dependent Claim
13 words
The fabric of claim 7 wherein: said core is at least 97.9% silica.
Claim 13
Dependent Claim
15 words
The fabric of claim 7 wherein: said core is proportionally greater than 50% by weight.
Claim 14
Dependent Claim
15 words
The fabric of claim 7 wherein: said core is proportionally greater than 53% by weight.
Claim 15
Dependent Claim
15 words
The fabric of claim 12 wherein: said fabric is woven in a herringbone repeat pattern.
Claim 16
Dependent Claim
18 words
The fabric of claim 12 wherein: said fabric is woven with a maximum theoretical cover factor of 1.
Claim 17
Dependent Claim
17 words
The fabric of claim 12 wherein: said fabric is woven with a theoretical cover factor of 0.92%.
Claim 18
Dependent Claim
14 words
The fabric of claim 15 wherein: said fabric further comprises a herringbone repeat pattern.
Claim 19
Dependent Claim
51 words
A high temperature resistant fabric having structural integrity above 1800° F., said fabric comprised of: interwoven yarns, each of which is comprised essentially of a core filament of high temperature silica having the thermal performance of a refractory material, and a covering of polybenzimidazole sheating said core, and a metallic laminate.
Claim 20
Dependent Claim
51 words
A high temperature resistant fabric having structural integrity above 1800° F., said fabric comprised of: interwoven yarns, each of which is comprised essentially of a core filament of high temperature silica having the thermal performance of a refractory material, and a covering of polybenzimidazole sheating said core, and a metallic laminate.
Claim 21
Dependent Claim
15 words
The fabric of claim 17 wherein: said core is proportionally greater than 50% by weight.
Claim 22
Dependent Claim
15 words
The fabric of claim 18 wherein: said fabric is woven in a herringbone repeat pattern.
Claim 23
Dependent Claim
17 words
The fabric of claim 19 wherein: said fabric is woven with a calculated cover factor of 0.92%.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |