US4331729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant and protective fabric and yarn for making the same
Assignee: NORFAB Corp NORRISTOWN PA A CORP OF PA
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Filing: 1980-12-01
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Granted: 1982-05-25
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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 non-melting heat stabilized polyacrylonitrile fibers covered by a layer of aramid fibers or other heat resisting fibers with or without blending with other fibers, the covering layer providing a cushion to provide increased 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
2026-10-24 19:51
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/36; D02G3/44; D02G3/443; D03; D03D; D03D15/00; D03D15/50; D03D15/513; D10; D10B; D10B2321/00; D10B2321/10; D10B2331/00; D10B2331/02; D10B2331/021; D10B2331/14; Y; Y10; Y10S; Y10S57/00; Y10S57/904; Y10T; Y10T442/00; Y10T442/30; Y10T442/3065; Y10T442/3073; Y10T442/3081; Y10T442/3179; Y10T442/3382; Y10T442/3415
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
53 words
A high temperature resistant woven textile fabric of yarn having a central core of high temperature resistant heat stabilized polyacrylonitrile fibers, said core being enclosed within a wrapping consisting of high temperature resistant fibers, and said wrapping consists of fibers selected from the group consisting of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 2
Dependent Claim
53 words
A high temperature resistant woven textile fabric of yarn having a central core of high temperature resistant heat stabilized polyacrylonitrile fibers, said core being enclosed within a wrapping consisting of high temperature resistant fibers, and said wrapping consists of fibers selected from the group consisting of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 3
Dependent Claim
20 words
A textile fabric as defined in claim 1 in which said wrapping consists at least in part of aramid fibers.
Claim 4
Dependent Claim
18 words
A textile fabric as defined in claim 1 in which said woven textile fabric is a herringbone weave.
Claim 5
Dependent Claim
21 words
A textile fabric as defined in claim 1 in which said fabric has adherent to one face thereof a metallic lamination.
Claim 6
Dependent Claim
16 words
A textile fabric as defined in claim 4 in which said metallic lamination is aluminum foil.
Claim 7
Dependent Claim
54 words
A yarn resistant to high temperatures comprising a central core of high temperature resistant heat stabilized polyacrylonitrile fibers, said core being enclosed within a wrapping consisting at least in part of high temperature resistant fibers, and said wrapping is of fibers selected from the group consisting of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 8
Dependent Claim
54 words
A yarn resistant to high temperatures comprising a central core of high temperature resistant heat stabilized polyacrylonitrile fibers, said core being enclosed within a wrapping consisting at least in part of high temperature resistant fibers, and said wrapping is of fibers selected from the group consisting of aramid fibers, polybenzimidazole fibers and phenolic fibers.
Claim 9
Dependent Claim
19 words
A yarn as defined in claim 6 in which said wrapping consists at least in part of aramid fibers.
Claim 10
Dependent Claim
20 words
A yarn as defined in claim 6 in which said wrapping is of a blend of fibers including aramid fibers.
Claim 11
Dependent Claim
27 words
A yarn as defined in claim 6 in which said core fibers are subject to abrasion, and said wrapping cushions and protects the core fibers against abrasion.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |