US4661376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing electrically conductive fibers
Assignee: RCS Technology Corp
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Filing: 1985-12-27
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Granted: 1987-04-28
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Expires: 2005-12-27
Abstract
Abstract A method of producing electrically conductive fibers by treating acrylic fibers, acrylic-series fibers, or nylons in a heated bath which contains copper (II) sulfide and an acid. The copper (II) sulfide is adsorbed into the fibers in the presence of the heated acid to improve electrical conductivity of the fibers.
Inventors
- 👤 Paul M. Liang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
D; D06; D06M; D06M11/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; D06M11/51; D06M11/53; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
51 words
A method of producing electrically conducting fibers comprising the steps of: (a) preparing a single bath containing a solution of a divalent metal sulfide and an acid; and (b) heat said bath; and (c) immersing said fibers in said bath to effect adsorption of said divalent metal sulfide onto said fibers.
Claim 2
Independent Claim
51 words
A method of producing electrically conducting fibers comprising the steps of: (a) preparing a single bath containing a solution of a divalent metal sulfide and an acid; and (b) heat said bath; and (c) immersing said fibers in said bath to effect adsorption of said divalent metal sulfide onto said fibers.
Claim 3
Dependent Claim
22 words
The method of claim 1 and a step (d) of removing said fibers from said solution then washing said fibers with water.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein step (a) includes preparing said solution by dissolving copper (II) sulfide in said acid.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein said acid is a strong inorganic acid.
Claim 6
Dependent Claim
11 words
The method of claim 4 wherein said acid is hydrochloric acid.
Claim 7
Dependent Claim
19 words
The method of claim 4 wherein said acid is diluted to between 1N-6N prior to immersion of said fibers.
Claim 8
Dependent Claim
13 words
The method of claim 5 wherein said fibers are acrylic or modacrylic fibers.
Claim 9
Dependent Claim
14 words
The method of claim 5 wherein said fibers are interwoven into a nylon screen.
Claim 10
Dependent Claim
25 words
The method of claim 5 wherein step (b) includes heating said solution to between 50°-100° C. for 1-2 hours prior to immersion of said fibers.
Claim 11
Dependent Claim
27 words
The method of claim 8 wherein step (a) includes adding carbon black powder to said solution at 30% weight to weight ratio with said copper (II) sulfide.
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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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |