US4567094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High conductivity graphite material and method of weaving
Assignee: Fiberite Inc
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Filing: 1984-03-19
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Granted: 1986-01-28
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Expires: 2004-03-19
Abstract
Abstract A method of forming an electrically conductive weavable multifilament graphite element which comprises wrapping around a multifilament graphite element at least one electrically conductive filament.
Inventors
- 👤 Jordan Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:12
CPC Classifications
B; B04; B04C; B04C1/00; D; D03; D03D; D03D15/00; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; D01; D01F; D01F11/00; D01F11/10; D01F11/14; D02; D02G; D02G3/00; D02G3/44; D02G3/441; D03D15/20; D03D15/242; D03D15/25; D03D15/275; D03D15/50; D03D15/573; H; H05; H05B; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B3/347; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; B29K; B29K2995/00; B29K2995/0003; B29K2995/0005; D10; D10B; D10B2101/00; D10B2101/10; D10B2101/12; D10B2101/20; D10B2401/00; D10B2401/06; D10B2401/062; D10B2401/16; D10B2505/00; H05B2203/00; H05B2203/002; H05B2203/005; H05B2203/011; H05B2203/014; H05B2203/015; H05B2203/017; H05B2203/033; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/107; Y10T442/109; Y10T442/133
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
141 words
A method for preparing a woven, drapable, electrically conductive graphite fabric having warp elements and fill elements which comprises the steps of: (a) Forming an electrically conductive weavable multifilament graphite element by wrapping around a parent multifilament graphite element, having from about 1,000 to about 200,000 graphite fibers, at least one electrically conductive filament having a diameter substantially less than the largest cross-section dimension of the multifilament graphite element, the electrically conductive filament thereby being combined with the graphite element such that the resultant composite graphite element member retains the high stiffness of the parent multifilament graphite element; and (b) weaving the electrically conductive weavable multifilament graphite element with multifilament graphite elements which have not been wrapped with a conductive filament such that every electrically conductive weavable multifilament graphite element is immediately adjacent to a parallel, relatively non-conductive multifilament graphite element.
Claim 2
Independent Claim
141 words
A method for preparing a woven, drapable, electrically conductive graphite fabric having warp elements and fill elements which comprises the steps of: (a) Forming an electrically conductive weavable multifilament graphite element by wrapping around a parent multifilament graphite element, having from about 1,000 to about 200,000 graphite fibers, at least one electrically conductive filament having a diameter substantially less than the largest cross-section dimension of the multifilament graphite element, the electrically conductive filament thereby being combined with the graphite element such that the resultant composite graphite element member retains the high stiffness of the parent multifilament graphite element; and (b) weaving the electrically conductive weavable multifilament graphite element with multifilament graphite elements which have not been wrapped with a conductive filament such that every electrically conductive weavable multifilament graphite element is immediately adjacent to a parallel, relatively non-conductive multifilament graphite element.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein the diameter of the electrically conductive filament is such that the multifilament graphite element is not twisted and is not bent during the wrapping of the electrically conductive filament around the multifilament graphite element.
Claim 4
Dependent Claim
36 words
The method of claim 1 wherein the diameter of the electrically conductive filament is such that the multifilament graphite element is substantially untwisted and unbent after wrapping the electrically conductive filament around the multifilament graphite element.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein the electrically conductive filament is a metallic filament.
Claim 6
Dependent Claim
13 words
The method of claim 4 wherein the metallic filament is an aluminum filament.
Claim 7
Dependent Claim
8 words
The product of the method of claim 1.
Claim 8
Independent Claim
117 words
A method to weave a drapable and formable graphite fabric which comprises the steps of: (a) forming a warp from multifilament graphite elements and forming a fill from multifilament graphite elements wherein there are wrapped around less than all of the multifilament graphite elements an effective number of electrically conductive filaments, having an electrical resistivity less than that of graphite, sufficient to prevent charge build-up, caused by lightning or electrical storm, on the graphite fabric; and (b) weaving the multifilament graphite elements such that each electrically conductive multifilament graphite element is adjacent to parallel, relatively non-conductive multifilament graphite elements, the resultant multifilament graphite elements being weavable into a drapable and formable graphite fabric by conventional weaving means.
Claim 9
Independent Claim
117 words
A method to weave a drapable and formable graphite fabric which comprises the steps of: (a) forming a warp from multifilament graphite elements and forming a fill from multifilament graphite elements wherein there are wrapped around less than all of the multifilament graphite elements an effective number of electrically conductive filaments, having an electrical resistivity less than that of graphite, sufficient to prevent charge build-up, caused by lightning or electrical storm, on the graphite fabric; and (b) weaving the multifilament graphite elements such that each electrically conductive multifilament graphite element is adjacent to parallel, relatively non-conductive multifilament graphite elements, the resultant multifilament graphite elements being weavable into a drapable and formable graphite fabric by conventional weaving means.
Claim 10
Dependent Claim
47 words
The method of claim 7 wherein the fabric is about 0.01 to 2 meters in the fill dimension and has at least one conductive fiber for each 1 to 10 millimeters of either the warp or the fill dimension, or both the warp and the fill dimension.
Claim 11
Dependent Claim
29 words
The method of claim 7 wherein the diameter of the electrically conductive fiber is substantially smaller than the largest cross-section dimension of either the warp or the fill element.
Claim 12
Dependent Claim
20 words
The method of claim 7 wherein the warp or the fill multifilament graphite element contains 1,000 to 200,000 graphite fibers.
Claim 13
Dependent Claim
13 words
The method of claim 7 wherein the conductive fiber comprises a metallic fiber.
Claim 14
Dependent Claim
13 words
The method of claim 7 wherein the metallic fiber is an aluminum fiber.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |