US4750443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire-blocking textile fabric
Assignee: EIDP Inc
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Filing: 1986-08-21
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Granted: 1988-06-14
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Expires: 2006-08-21
Abstract
Abstract A textile fabric suitable for use as a fire-blocking sheet in aircraft seat cushion comprises three to seven, fastened together nonwoven layers of hydarulically needled batts of aramid staple fibers.
Inventors
- 👤 Michael A. Blaustein
- 👤 Dennis A. Nollen
- 👤 Loretta A. G. Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A47; A47C; A47C31/00; A47C31/001; B32B5/02; B32B5/022; B32B5/024; B32B5/06; B64; B64D; B64D11/00; B64D11/06; B64D11/0647; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/4334; D04H1/4342; D04H1/4374; D04H1/44; D04H1/46; D04H1/492; D04H1/52; D04H11/00; B32B2264/00; B32B2264/02; B32B2264/0214; B32B2264/0264; B32B2264/0271; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2605/00; B32B2605/003; D10; D10B; D10B2331/00; D10B2331/02; D10B2331/021; Y; Y10; Y10S; Y10S297/00; Y10S297/05; Y10S428/00; Y10S428/902; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/27; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31725; Y10T428/31728; Y10T442/00; Y10T442/60; Y10T442/659; Y10T442/666; Y10T442/667; Y10T442/696
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A textile fabric suitable for use as a fire-blocking sheet comprising three to seven, fastened together nonwoven layers, each layer being a non-apertured, hydraulically needled batt weighing in the range of 1 to 3 oz/yd 2 and consisting essentially of 25 to 100 weight percent of poly(p-phenylene terephthalamide) staple fibers and 0 to 75 weight percent of poly(m-phenylene isophthalamide) staple fibers, the total weight of all the layers being at least 6 oz/yd 2 .
Claim 2
Dependent Claim
75 words
A textile fabric suitable for use as a fire-blocking sheet comprising three to seven, fastened together nonwoven layers, each layer being a non-apertured, hydraulically needled batt weighing in the range of 1 to 3 oz/yd 2 and consisting essentially of 25 to 100 weight percent of poly(p-phenylene terephthalamide) staple fibers and 0 to 75 weight percent of poly(m-phenylene isophthalamide) staple fibers, the total weight of all the layers being at least 6 oz/yd 2 .
Claim 3
Dependent Claim
19 words
The fabric of claim 1 wherein at least one of the nonwoven layers consists essentially of poly(p-phenylene terephthalamide) fibers.
Claim 4
Dependent Claim
12 words
The fabric of claim 1 wherein there are four to six layers.
Claim 5
Dependent Claim
26 words
The fabric of claim 1 wherein the individual layers have been stretched in the range of 10 to 20% in the cross-machine direction after hydraulic needling.
Claim 6
Dependent Claim
23 words
The fabric of claim 1 wherein the individual layers have a fabric weight in the range of 1.5 to 2.0 oz/yd 2 .
Claim 7
Dependent Claim
18 words
The fabric of claim 1 wherein the nonwoven layers are fastened together by stitches of a flame-resistant thread.
Claim 8
Dependent Claim
12 words
The fabric of claim 6 wherein the thread is an aramid thread.
Claim 9
Dependent Claim
16 words
The fabric of claim 1 wherein the fastening is a zig-zag stitching in a diamond pattern.
Claim 10
Dependent Claim
20 words
The fabric of claim 1 wherein a layer of woven fabric of flame-resistant fibers is incorporated in the textile fabric.
Claim 11
Dependent Claim
21 words
A fabric of claim 1, 2 or 6 wherein the total fabric weight is no greater than 10 oz/yd 2 .
Claim 12
Dependent Claim
23 words
A fabric of claim 10 wherein the density of the fabric is in the range of 0.10 to 0.15 grams per cubic centimeter.
Claim 13
Dependent Claim
23 words
A fabric of claim 10 wherein the density of the fabric is in the range of 0.11 to 0.14 grams per cubic centimeter.
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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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |