Patent US4857404A successfully refreshed from Google Patents.
US4857404A
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Fluorinated carbonaceous fibers
Assignee: Dow Chemical Co
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Filing: 1988-08-24
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Granted: 1989-08-15
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Expires: 2008-08-24
Abstract
Abstract A fiber product comprising a core of a flexible, non-flammable carbonaceous polymeric fibers having an aspect ratio greater than 10:1, and a non-electrically conductive fluorinated surface.
Inventors
- 👤 Francis P. McCullough, Jr.
- 👤 Leo J. Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:37
CPC Classifications
D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F11/121; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2922; Y10T428/2925; Y10T428/2929; Y10T428/2933; Y10T428/2938; Y10T428/2982; Y10T428/30; Y10T428/31504; Y10T428/31536; Y10T428/3154
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
35 words
A fiber product comprising a core of a flexible, non-flammable carbonaceous polymeric fibers having an aspect ratio greater than 10:1 and a reversible deflection ratio of greater than 1.2:1, and a non-electrically conductive fluorinated surface.
Claim 2
Dependent Claim
35 words
A fiber product comprising a core of a flexible, non-flammable carbonaceous polymeric fibers having an aspect ratio greater than 10:1 and a reversible deflection ratio of greater than 1.2:1, and a non-electrically conductive fluorinated surface.
Claim 3
Dependent Claim
20 words
The fiber product of claim 1 wherein said fibers are non-linear and has a reversible deflection ratio greater than 1.2:1.
Claim 4
Dependent Claim
13 words
The fiber product of claim 2 wherein the fibers have a sinusoidal configuration.
Claim 5
Dependent Claim
13 words
The fiber product of claim 2 wherein the fibers have a coil-like configuration.
Claim 6
Dependent Claim
13 words
The fiber product of claim 1 which is derived from acrylic based fibers.
Claim 7
Dependent Claim
14 words
The fiber product of claim 1 wherein said carbonaceous fibers have static dissipating characteristics.
Claim 8
Dependent Claim
13 words
The fiber product of claim 1 wherein said carbonaceous fibers are electrically conductive.
Claim 9
Dependent Claim
14 words
The fiber product of claim 1 which is derived from an aromatic polyamide fiber.
Claim 10
Dependent Claim
84 words
A fiber product comprising: a core of a flexible, electroconductive carbonaceous fiber derived from a stabilized polymeric non-linear carbonaceous fiber precursor material, said fiber having a diameter of 4 to about 20 micrometers, a capability of repeatedly deflecting under load either by elongation or compression such that the fiber spring structure recovers its initial shape configuration when unloaded, an aspect ratio greater than 10:1, and a reversible deflection ratio of greater than about 1.2:1; and said fiber having a non-electrically conductive fluorinated surface thereon.
Claim 11
Dependent Claim
84 words
A fiber product comprising: a core of a flexible, electroconductive carbonaceous fiber derived from a stabilized polymeric non-linear carbonaceous fiber precursor material, said fiber having a diameter of 4 to about 20 micrometers, a capability of repeatedly deflecting under load either by elongation or compression such that the fiber spring structure recovers its initial shape configuration when unloaded, an aspect ratio greater than 10:1, and a reversible deflection ratio of greater than about 1.2:1; and said fiber having a non-electrically conductive fluorinated surface thereon.
Claim 12
Dependent Claim
17 words
The fiber product of claim 9 wherein said carbonaceous fiber is derived from an acrylic based fiber.
Claim 13
Dependent Claim
16 words
The fiber product of claim 9 wherein said carbonaceous fiber is derived from an aromatic polyamide.
Claim 14
Dependent Claim
13 words
The fiber product of claim 9 wherein said carbonaceous fiber is electrically conductive.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |