Patent US4670327A successfully refreshed from Google Patents.
US4670327A
Expired / Lapsed
US
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Heat resistant and protective fabric and yarn for making the same
Assignee: Norfab Corp
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Filing: 1980-12-01
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Granted: 1987-06-02
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Expires: 2000-12-01
Abstract
Abstract A heat resistant fabric is provided, preferably woven, and with an optional aluminized backing, the fabric being made from yarns having a core of flame and high heat resistant silica fibers covered by a layer of aramid fiber, or other heat resisting fibers, with or without blending with other fibers, the covering layer providing a cushion to increase abrasion resistance of the core while also providing a heat resistant covering for the core.
Inventors
- 👤 John W. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:15
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/443; A; A41; A41D; A41D31/00; A41D31/04; A41D31/08; A41D31/085; B; B32; B32B; B32B15/00; B32B15/14; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10S428/92; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2936; Y10T428/2964; Y10T428/2967; Y10T442/00; Y10T442/30; Y10T442/3146; Y10T442/3154; Y10T442/3179; Y10T442/60; Y10T442/637; Y10T442/641; Y10T442/696
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
A yarn comprising a sheath of individually wrapped aramid fibers surrounding and substantially covering a continuous filament core of amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material.
Claim 2
Dependent Claim
36 words
A yarn comprising a sheath of individually wrapped aramid fibers surrounding and substantially covering a continuous filament core of amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material.
Claim 3
Dependent Claim
36 words
A composite yarn comprising a wrapping of individual fibers which are wrapped about a continuous filament core of an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material.
Claim 4
Dependent Claim
36 words
A composite yarn comprising a wrapping of individual fibers which are wrapped about a continuous filament core of an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material.
Claim 5
Dependent Claim
15 words
The yarn of claim 2 wherein said wrapping is less heat resistant than said core.
Claim 6
Dependent Claim
26 words
The yarn of claim 3 wherein said wrapping is comprised of fibers selected from the group consisting essentially of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 7
Dependent Claim
19 words
The yard of claim 2 wherein said core has a twist on the order of four turns per inch.
Claim 8
Dependent Claim
70 words
A protective garmet comprised of a high temperature fabric produced by interweaving composite yarns, each composite yarn comprising a continuous core filament of amorphous silica product containing approximately 95% silica and having the thermal performance of a refractory material and a wrapping encasing said continuous core filament, said wrapping being further comprised of individually wrapped fibers selected from the group consisting essentially of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 9
Dependent Claim
70 words
A protective garmet comprised of a high temperature fabric produced by interweaving composite yarns, each composite yarn comprising a continuous core filament of amorphous silica product containing approximately 95% silica and having the thermal performance of a refractory material and a wrapping encasing said continuous core filament, said wrapping being further comprised of individually wrapped fibers selected from the group consisting essentially of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 10
Dependent Claim
78 words
A woven high temperature resistant textile fabric having interwoven yarns comprised of a core yarn and a wrapping of individual fibers wherein the core yarn is an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material and the wrapping is less temperature resistant than the core yarn and is selected from a group consisting of aramid fibers, polybenzimidazole fibers, phenolic fibers or of a blend of fibers from the group.
Claim 11
Dependent Claim
78 words
A woven high temperature resistant textile fabric having interwoven yarns comprised of a core yarn and a wrapping of individual fibers wherein the core yarn is an amorphous silica product containing at least 96% silica and having the thermal performance of a refractory material and the wrapping is less temperature resistant than the core yarn and is selected from a group consisting of aramid fibers, polybenzimidazole fibers, phenolic fibers or of a blend of fibers from the group.
Claim 12
Dependent Claim
17 words
The woven textile fabric according to claim 7, characterized in that the same is a herringbone weave.
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |