US4410593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conducting fiber and method of making same
Assignee: Nihon Sanmo Dyeing Co Ltd
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Filing: 1980-09-03
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Granted: 1983-10-18
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Expires: 2000-09-03
Abstract
Abstract Electrically conducting acrylic and modacrylic fibers are prepared by subjecting the fibers to a first heat-treatment in a bath containing a copper compound and a reducing agent to adsorb monovalent copper ions within the fibers. The heat-treated fibers are washed thoroughly and then subjected to a second heat-treatment in the presence of a sulfur-containing compound to convert the adsorbed monovalent copper ions to copper sulfide. The electrically conducting fibers have superior conductivity which is not lost in repeated washings. The electrically conductive fibers can be dyed readily with cationic dyes without loss of electrical conductivity. The electrically conductive fibers of the present invention possess the touch and other physical characteristics of the starting acrylic or modacrylic fibers.
Inventors
- 👤 Shinji Tomibe
- 👤 Reizo Gomibuchi
- 👤 Kiyofumi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:47
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/51; D06M11/53; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; D06M2101/00; D06M2101/16; D06M2101/18; D06M2101/26; D06M2101/28; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12035; Y10T428/12063; Y10T428/12104; Y10T428/12111; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
18 words
An electrically conducting fiber consisting essentially of an acrylic or modacrylic fiber which is impregnated with copper sulfide.
Claim 2
Dependent Claim
18 words
An electrically conducting fiber consisting essentially of an acrylic or modacrylic fiber which is impregnated with copper sulfide.
Claim 3
Dependent Claim
39 words
An electrically conducting fiber as claimed in claim 1 wherein the weight percentage of copper sulfide expressed in terms of the weight of metallic copper is about 1% to about 30% based upon the weight of the starting fiber.
Claim 4
Dependent Claim
18 words
An electrically conducting fiber as claimed in claim 1 or 2 wherein said copper sulfide is cupric sulfide.
Claim 5
Dependent Claim
18 words
An electrically conducting fiber as claimed in claim 1 or 2 wherein said copper sulfide is cuprous sulfide.
Claim 6
Dependent Claim
27 words
An electrically conducting fiber as claimed in claim 1 or 2 wherein said copper sulfide is in the form of digenite which is adsorbed within the fiber.
Claim 7
Dependent Claim
18 words
An electrically conducting fiber as claimed in claim 1 or 2 which is dyed with a cationic dye.
Claim 8
Dependent Claim
33 words
An electrically conducting fiber as claimed in claim 1 or 2 wherein the electrical conductivity is imparted to said fiber by converting monovalent copper ions adsorbed within the fiber to said copper sulfide.
Claim 9
Dependent Claim
33 words
An electrically conducting fiber as claimed in claim 7 wherein the monovalent copper ions are adsorbed within the fiber by heat-treating it in a bath containing a copper compound and a reducing agent.
Claim 10
Dependent Claim
36 words
An electrically conducting fiber as claimed in claim 7 wherein the adsorbed monovalent copper ions are converted to copper sulfide by heat-treating the fiber having adsorbed monovalent copper ions in the presence of a sulfur-containing compound.
Claim 11
Dependent Claim
36 words
An electrically conducting fiber as claimed in claim 8 wherein the adsorbed monovalent copper ions are converted to copper sulfide by heat-treating the fiber having adsorbed monovalent copper ions in the presence of a sulfur-containing compound.
Claim 12
Dependent Claim
30 words
An electrically conducting fiber as claimed in claim 7 wherein the fiber having adsorbed monovalent copper ions is washed prior to converting the adsorbed monovalent copper ions to copper sulfide.
Claim 13
Dependent Claim
30 words
An electrically conducting fiber as claimed in claim 8 wherein the fiber having adsorbed monovalent copper ions is washed prior to converting the adsorbed monovalent copper ions to copper sulfide.
References Cited (Backward Citations)
FR644429A
Cited
US2743991A
Cited
US2779726A
Cited
US3014818A
Cited
US3416874A
Cited
US3790341A
Cited
GB1372656A
Cited
US3940533A
Cited
GB1396072A
Cited
US3958066A
Cited
US4122143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-17 | 1987-04-18 | 1987-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-17 | 1991-04-18 | 1991-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-17 | 1995-04-18 | 1995-10-18 | $7700.00 | Window Closed / Lapsed |