Patent US4943478A successfully refreshed from Google Patents.
US4943478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seat cushions
Assignee: Dow Chemical Co
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Filing: 1988-06-14
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Granted: 1990-07-24
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Expires: 2008-06-14
Abstract
Abstract A non-linear fire retarding and fire blocking covering for a foam seat cushion structure comprising an intimate blend of a binder and 25-75% by weight of fibers comprising heat set carbonaceous fibers having a LOI value greater than 40, said carbonaceous fibers being derived from heat treated stabilized polymeric fibers or pitch based fibers.
Inventors
- 👤 Francis P. McCullough, Jr.
- 👤 R. Vernon Snelgrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:24
CPC Classifications
B; B32; B32B; B32B7/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4209; D04H1/4242; D04H1/4382; D04H1/43835; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/30; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/63; Y10T442/632; Y10T442/696
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
70 words
A non-woven fire retarding and fire blocking covering for a foam seat cushion structure comprising an intimate blend of, a binder and 25-75% by weight of fibers comprising heat set non-linear, non-graphitic carbonaceous fibers having a LOI value greater than 40, reversible deflection ratio of greater than 1.2:1, and an aspect ratio greater than 10:1, said carbonaceous fibers being derived from heat treated stabilized polymeric fibers or pitch based fibers.
Claim 2
Dependent Claim
70 words
A non-woven fire retarding and fire blocking covering for a foam seat cushion structure comprising an intimate blend of, a binder and 25-75% by weight of fibers comprising heat set non-linear, non-graphitic carbonaceous fibers having a LOI value greater than 40, reversible deflection ratio of greater than 1.2:1, and an aspect ratio greater than 10:1, said carbonaceous fibers being derived from heat treated stabilized polymeric fibers or pitch based fibers.
Claim 3
Dependent Claim
13 words
The covering of claim 1, wherein said carbonaceous fibers have a sinusoidal configuration.
Claim 4
Dependent Claim
13 words
The covering of claim 1, wherein said carbonaceous fibers have a coil-like configuration.
Claim 5
Dependent Claim
15 words
The covering of claim 1, wherein said carbonaceous fibers are derived from stabilized acrylic fibers.
Claim 6
Dependent Claim
15 words
The covering of claim 1, wherein said carbonaceous fibers are derived from stabilized polyacrylonitrile fibers.
Claim 7
Dependent Claim
18 words
The covering of claim 1, comprising carbonaceous fibers having a nitrogen content of about, 18 to about 20%.
Claim 8
Dependent Claim
23 words
The covering of claim 1, further comprising a natural fiber selected from the group consisting of cotton, wool, flax, silk and mixtures thereof.
Claim 9
Dependent Claim
11 words
The covering of claim 1, wherein said binder is a polyester.
Claim 10
Dependent Claim
14 words
The covering of claim 1, further comprising synthetic fibers blended with said carbonaceous fibers.
Claim 11
Dependent Claim
23 words
The covering of claim 9 wherein said synthetic fibers are selected from the group consisting of polyolefin, polyester, polyacrylonitrile, polyvinyl chloride and ionomers.
Claim 12
Dependent Claim
43 words
A fire retarding and fire blocking non-woven fabric covering for a foam set cushion composing an intimate blend of 25 to 75% by weight of heat set, non-linear, non-graphitic carbonaceous fibers having an LOI value greater than 40, synthetic fibers and a binder.
Claim 13
Dependent Claim
43 words
A fire retarding and fire blocking non-woven fabric covering for a foam set cushion composing an intimate blend of 25 to 75% by weight of heat set, non-linear, non-graphitic carbonaceous fibers having an LOI value greater than 40, synthetic fibers and a binder.
Claim 14
Dependent Claim
30 words
The covering of claim 11, further comprising natural fibers in said blend said carbonaceous fibers having a reversible deflection ratio of greater than 1.2:1 an aspect ratio greater than 10:1.
Claim 15
Dependent Claim
11 words
The covering of claim 11, wherein said binder is a polyester.
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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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |