Patent US4978571A successfully refreshed from Google Patents.
US4978571A
Expired / Lapsed
US
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Carbonaceous fiber or fiber assembly with inorganic coating
Assignee: Dow Chemical Co
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Filing: 1989-06-14
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Granted: 1990-12-18
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Expires: 2009-06-14
Abstract
Abstract A thermally stable metal coated carbonaceous fiber batting, fiber tow, yarn or fabric which maintains loft, has some degree of resiliency and some degree of stability in the presence of various concentrations of oxygen at elevated temperatures, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.
Inventors
- 👤 Francis P. McCullough, Jr.
- 👤 Steven L. Brewster
- 👤 R. Vernon Snelgrove
- 👤 George C. Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:48
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/126; D01F11/123; D01F11/124; D01F11/127; Y; Y10; Y10T; Y10T442/00; Y10T442/30; Y10T442/3382; Y10T442/339; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/63; Y10T442/654; Y10T442/655
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
An oxygen and thermally stable woven, non-woven or knit fabric comprising carbonaceous fibers with a metal surface coating thereon, said carbonaceous fibers comprising resilient shaped reforming elongatable non-linear non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.
Claim 2
Dependent Claim
49 words
An oxygen and thermally stable woven, non-woven or knit fabric comprising carbonaceous fibers with a metal surface coating thereon, said carbonaceous fibers comprising resilient shaped reforming elongatable non-linear non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1.
Claim 3
Dependent Claim
16 words
The woven, non-woven or knit fabric of claim 1 wherein the fibers have a sinusoidal configuration.
Claim 4
Dependent Claim
16 words
The woven, non-woven or knit fabric of claim 1 wherein the fibers have a coil-like configuration.
Claim 5
Dependent Claim
18 words
The woven, non-woven or knit fabric of claim 1 wherein the fibers are derived from oxidized polyacrylonitrile fibers.
Claim 6
Dependent Claim
19 words
The woven, non-woven or knit fabric of claim 1 wherein the fiber is derived from an acrylic based polymer.
Claim 7
Dependent Claim
46 words
The woven, non-woven or knit fabric of claim 1 wherein said fibers have a resistance of greater than 10 7 ohms per inch when measured on a 6K tow formed from precursor fibers having a diameter of 7 to 20 microns and are non-electrically conductive fibers.
Claim 8
Dependent Claim
44 words
The woven, non-woven or knit fabric of claim 1 wherein said fibers have a resistance less than 10 4 ohms per inch when measured on a 6K tow formed from precursor fibers having a diameter of 7 to 20 microns and are electrically conductive.
Claim 9
Dependent Claim
47 words
The woven, non-woven or knit fabric of claim 1 wherein said fibers have a resistance of about 10 7 to 10 4 ohms per inch when measured on a 6K tow formed from precursor fibers having a diameter of 7 to 20 microns and posses anti-static characteristics.
Claim 10
Dependent Claim
62 words
An oxygen and thermally stable woven, non-woven or knit fabric comprising carbonaceous fibers with a metal surface coating thereon, said carbonaceous fibers comprising resilient shape reforming elongatable non-linear, non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1, said metal being selected from the group consisting of nickel, gold, and titanium.
Claim 11
Dependent Claim
62 words
An oxygen and thermally stable woven, non-woven or knit fabric comprising carbonaceous fibers with a metal surface coating thereon, said carbonaceous fibers comprising resilient shape reforming elongatable non-linear, non-flammable carbonaceous fibers, said fibers having a reversible deflection ratio of greater than 1.2:1 and an aspect ratio greater than 10:1, said metal being selected from the group consisting of nickel, gold, and titanium.
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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) | 1993-12-17 | 1994-06-18 | 1994-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-17 | 1998-06-18 | 1998-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-17 | 2002-06-18 | 2002-12-18 | $7700.00 | Window Closed / Lapsed |