US4296174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spandex filaments containing certain metallic soaps
Assignee: EIDP Inc
•
Filing: 1980-08-08
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Granted: 1981-10-20
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Expires: 2000-08-08
Abstract
Abstract Spandex filaments are provided with decreased tackiness by effective amounts of soap dispersed within the filaments. The soap is a metal salt of a fatty acid, the metal being calcium, lithium or magnesium and the fatty acid being a saturated or unsaturated fatty acid having 10 to 22 carbon atoms. Stearates are preferred.
Inventors
- 👤 Robert S. Hanzel
- 👤 Paul J. Sauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; D01; D01F; D01F6/00; D01F6/58; D01F6/70; Y; Y10; Y10S; Y10S528/00; Y10S528/906; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/294; Y10T428/2958; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
An improved spandex filament of the type having a lubricating finish on its surface, the improvement comprising a soap dispersed within the filament in an amount equal to at least 0.3% by weight of the filament and being a metal salt of a fatty acid, the metal being selected from the group consisting of calcium, lithium and magnesium and the fatty acid being selected from the group consisting of saturated and unsaturated fatty acids having 10 to 22 carbon atoms.
Claim 2
Dependent Claim
80 words
An improved spandex filament of the type having a lubricating finish on its surface, the improvement comprising a soap dispersed within the filament in an amount equal to at least 0.3% by weight of the filament and being a metal salt of a fatty acid, the metal being selected from the group consisting of calcium, lithium and magnesium and the fatty acid being selected from the group consisting of saturated and unsaturated fatty acids having 10 to 22 carbon atoms.
Claim 3
Dependent Claim
20 words
The filament of claim 1 wherein the concentration of the soap dispersed in the filament is no more than 5%.
Claim 4
Dependent Claim
23 words
The filament of claim 1 wherein the concentration of the soap dispersed within the filament is in the range of 0.5 to 1.0%.
Claim 5
Dependent Claim
17 words
The filament of claim 1, 2 or 3 wherein the fatty acid is a saturated fatty acid.
Claim 6
Dependent Claim
15 words
The filament of claim 1, 2 or 3 wherein the soap is a metal stearate.
Claim 7
Dependent Claim
14 words
The filament of claim 1, 2 or 3 wherein the soap is calcium stearate.
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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) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |