US4336028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making electrically conducting fibers
Assignee: Nihon Sanmo Dyeing Co Ltd
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Filing: 1981-07-15
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Granted: 1982-06-22
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Expires: 2001-07-15
Abstract
Abstract A method of producing electrically conducting acrylic and acrylic-series fibers by treating the fibers in a treatment bath containing divalent copper ions, a reducing agent capable of reducing the divalent copper ions to monovalent copper ions and a sulfur-containing compound which provides sulfur which reacts with the monovalent copper ions to produce copper sulfide. The copper sulfide is adsorbed into the fiber and results in a fiber of superior conductivity and which posesses the touch and other physical characteristics of the starting fiber.
Inventors
- 👤 Shinji Tomibe
- 👤 Reizo Gomibuchi
- 👤 Kiyofumi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
D; D06; D06M; D06M15/00; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/122; D06M11/00; D06M11/51; D06M11/53; D06M2101/00; D06M2101/16; D06M2101/18; D06M2101/26; D06M2101/28
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A method of making an electrically conducting fiber comprising treating an acrylic fiber or modacrylic fiber in a bath containing divalent copper ions, a reducing agent capable of reducing said copper ions to monovalent copper ions and a sulfur-containing compound to convert said monovalent copper ions to copper sulfide wherein said fiber adsorbs copper sulfide.
Claim 2
Independent Claim
55 words
A method of making an electrically conducting fiber comprising treating an acrylic fiber or modacrylic fiber in a bath containing divalent copper ions, a reducing agent capable of reducing said copper ions to monovalent copper ions and a sulfur-containing compound to convert said monovalent copper ions to copper sulfide wherein said fiber adsorbs copper sulfide.
Claim 3
Dependent Claim
33 words
A method as claimed in claim 1 wherein said divalent copper ions are provided by at least one cupric compound selected from the group consisting of cupric sulfate, cupric chloride and cupric nitrate.
Claim 4
Dependent Claim
35 words
A method as claimed in claim 1 wherein said reducing agent is at least one member selected from the group consisting of metallic copper, ferrous sulfate, ammonium vanadate, sodium hypophosphite, hydroxylamine sulfate, furfural and glucose.
Claim 5
Dependent Claim
48 words
A method as claimed in claim 1 wherein the sulfur-containing compound is at least one member selected from the group consisting of sodium sulfide, dithionous acid, sodium dithionite, sodium thiosulfate, sulfurous acid, sodium hydrogen sulfite, sodium pyrosulfite, thiourea dioxide, Rongalite C, Rongalite Z, sulfur dioxide and hydrogen sulfide.
Claim 6
Independent Claim
29 words
A method as claimed in any one of claims 1, 2, 3 and 4 wherein the treatment is carried out at a temperature at from 40° and 120° C.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 5 wherein the electrically conducting fiber obtained in the treatment is dyed with a cationic dye.
References Cited (Backward Citations)
US2743991A
Cited
US2779726A
Cited
US3014818A
Cited
US3416874A
Cited
US3790341A
Cited
US3940533A
Cited
US4122143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |