US4185137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conductive sheath/core heterofilament
Assignee: Celanese Corp
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Filing: 1977-10-17
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Granted: 1980-01-22
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Expires: 1997-10-17
Abstract
Abstract Conductive thermoplastic sheath/core filaments having a reflectivity greater than 8 percent in the undelustered filament and fiber blends containing at least some of said conductive filaments. The sheath/core filament employs as a core a thermoplastic polymer having dispersed therein a material selected from the group consisting of zinc oxide, cuprous iodide, colloidal silver and colloidal graphite. The conductive filament when blended with nonconductive filaments is found to have utility as face yarns in pile fabrics.
Inventors
- 👤 Richard L. Kinkel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/44; D02G3/441; D01; D01D; D01D5/00; D01D5/28; D01D5/30; D01D5/34; D01F; D01F1/00; D01F1/02; D01F1/09; D01F8/00; D01F8/04; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23993; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2929
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A filament bundle selected from the group consisting of nylon or polyester filament bundles, containing at least one conductive filament having a resistance of less than 10 9 ohms/inch at a potential of 2 kilovolts comprising a sheath/core conductive filament wherein the sheath/core structure, exclusive of delusterants has a reflectance of about 31 percent and wherein said core is a conductive core, comprising a thermoplastic polymer having dispersed therein cuprous iodide particulate material having a particle size not greater than three microns.
Claim 2
Dependent Claim
82 words
A filament bundle selected from the group consisting of nylon or polyester filament bundles, containing at least one conductive filament having a resistance of less than 10 9 ohms/inch at a potential of 2 kilovolts comprising a sheath/core conductive filament wherein the sheath/core structure, exclusive of delusterants has a reflectance of about 31 percent and wherein said core is a conductive core, comprising a thermoplastic polymer having dispersed therein cuprous iodide particulate material having a particle size not greater than three microns.
Claim 3
Dependent Claim
95 words
A filament bundle selected from the group consisting of nylon or polyester filament bundles, containing at least one conductive filament having a resistance of less than 10 9 ohms/inch at a potential of 2 kilovolts comprising a sheath/core conductive filament wherein the sheath/core structure, exclusive of delusterants, has a reflectance of about 57 percent and wherein said sheath is a polyester sheath or a polyamide sheath and wherein said core is a conductive core, comprising a thermoplastic polymer having dispersed therein conductive zinc oxide particulate material having a particle size not greater than 3 microns.
Claim 4
Dependent Claim
95 words
A filament bundle selected from the group consisting of nylon or polyester filament bundles, containing at least one conductive filament having a resistance of less than 10 9 ohms/inch at a potential of 2 kilovolts comprising a sheath/core conductive filament wherein the sheath/core structure, exclusive of delusterants, has a reflectance of about 57 percent and wherein said sheath is a polyester sheath or a polyamide sheath and wherein said core is a conductive core, comprising a thermoplastic polymer having dispersed therein conductive zinc oxide particulate material having a particle size not greater than 3 microns.
References Cited (Backward Citations)
US3582445A
Cited
GB1393234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |