US4759986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conductive polybenzimidazole fibrous material
Assignee: CNA Holdings LLC
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Filing: 1986-10-23
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Granted: 1988-07-26
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Expires: 2006-10-23
Abstract
Abstract An electrically conductive shaped article such as a film or fibrous material and a process for preparing the same from a polybenzimidazole shaped article is provided. The polybenzimidazole article is first contacted with cuprous ions to produce a cuprous ion-impregnated material, and subsequently is subjected to a sulfiding agent capable of sulfiding cuprous ions, and preferably washed, to produce a polybenzimidazole shaped article having covellite copper sulfide in association therewith. Also provided are electrically conductive composites and a process for preparing the same by incorporating fibrous material prepared in accordance with the process within a substantially continuous polymeric matrix.
Inventors
- 👤 Y. M. Farug Marikar
- 👤 Michael M. Besso
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:12
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/55; D06M11/56; D06M11/53; H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/0353; H05K1/0366; H05K1/09; H05K3/00; H05K3/10; H05K3/105; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2929; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2964; Y10T428/2967; Y10T428/2973; Y10T428/2975; Y10T442/00; Y10T442/30; Y10T442/3049; Y10T442/3976
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
31 words
An electrically conductive fibrous material comprising polybenzimidazole fibrous material in association with approximately 5 to 60 percent by weight of covellite copper sulfide, based upon the total weight of the product.
Claim 2
Dependent Claim
31 words
An electrically conductive fibrous material comprising polybenzimidazole fibrous material in association with approximately 5 to 60 percent by weight of covellite copper sulfide, based upon the total weight of the product.
Claim 3
Dependent Claim
23 words
The electrically conductive fibrous material of claim 1, wherein said covellite copper sulfide is primarily located on the surface of the fibrous material.
Claim 4
Dependent Claim
22 words
The electrically conductive fibrous material of claim 1, comprising from about 5 to about 15 weight percent of said covellite copper sulfide.
Claim 5
Dependent Claim
22 words
The electrically conductive fibrous material of claim 1, comprising from about 25 to about 35 weight percent of said covellite copper sulfide.
Claim 6
Dependent Claim
22 words
The electrically conductive fibrous material of claim 1, comprising from about 35 to about 60 weight percent of said covellite copper sulfide.
Claim 7
Dependent Claim
36 words
The electrically conductive fibrous material of claim 1, wherein said fibrous material exhibits an electrical conductivity in the direction of its length of between about 0.001 and about 1000 ohm -1 cm -1 at 25° C.
Claim 8
Dependent Claim
36 words
The electrically conductive fibrous material of claim 5, wherein said fibrous material exhibits an electrical conductivity in the direction of its length of between about 500 and about 1000 ohm -1 cm -1 at 25° C.
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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) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |