Patent US4540746A successfully refreshed from Google Patents.
US4540746A
Expired / Lapsed
US
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Polyamide fiber
Assignee: EIDP Inc
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Filing: 1984-10-19
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Granted: 1985-09-10
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Expires: 2004-10-19
Abstract
Abstract Polyamide fibers are disclosed, said fibers comprising, as a distinct phase, from about 0.4 to about 10 weight percent, based upon weight of polyamide, of an additive mixture consisting essentially of (a) from 75 to 95 percent by weight of a low molecular weight poly(alkylene ether) component having an average molecular weight from about 1000 to about 6000; and (b) from 25 to 5 percent by weight of a high molecular weight poly(alkylene ether) component having an average molecular weight from about 70,000 to about 1,000,000.
Inventors
- 👤 Winston J. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:15
CPC Classifications
D; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/58; D01F6/60
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A polyamide fiber comprising, as a distinct phase, from about 0.4 to about 10 weight percent, based upon weight of polyamide, of an additive mixture consisting essentially of (a) from 75 to 95 percent by weight of a low molecular weight poly(alkylene ether) component having an average molecular weight from about 1000 to about 6000; and (b) from 25 to 5 percent by weight of a high molecular weight poly(alkylene ether) component having an average molecular weight from about 70,000 to about 1,000,000.
Claim 2
Dependent Claim
83 words
A polyamide fiber comprising, as a distinct phase, from about 0.4 to about 10 weight percent, based upon weight of polyamide, of an additive mixture consisting essentially of (a) from 75 to 95 percent by weight of a low molecular weight poly(alkylene ether) component having an average molecular weight from about 1000 to about 6000; and (b) from 25 to 5 percent by weight of a high molecular weight poly(alkylene ether) component having an average molecular weight from about 70,000 to about 1,000,000.
Claim 3
Dependent Claim
28 words
A fiber according to claim 1, wherein the additive mixture is present at a level of from 1 to 8 percent by weight, based upon weight of polyamide.
Claim 4
Dependent Claim
27 words
A fiber according to claim 2, wherein both the low molecular weight poly(alkylene ether) component and the high molecular weight poly(alkylene ether) component are poly(ethylene ether) glycols.
Claim 5
Dependent Claim
69 words
A fiber according to claim 3, wherein the additive mixture consists essentially of (a) from 80 to 92 percent by weight of a low molecular weight poly(ethylene ether) glycol component having an average molecular weight from about 1500 to 3000; and (b) from 20 to 8 percent by weight of a high molecular weight poly(ethylene ether) glycol component having an average molecular weight from about 100,000 to about 500,000.
Claim 6
Dependent Claim
28 words
A fiber according to claim 4, wherein the additive mixture is present at a level of from 2 to 6 percent by weight, based upon weight of polyamide.
Claim 7
Dependent Claim
40 words
A fiber according to claim 5, wherein the low molecular weight poly(ethylene ether) glycol component has an average molecular weight of about 2750, and the high molecular weight poly(ethylene ether) glycol component has an average molecular weight of about 100,000.
Claim 8
Dependent Claim
24 words
A process for producing a melt-spun polyamide fiber, comprising admixing an additive mixture as defined in claim 1 with a fiber-forming polyamide before spinning.
Claim 9
Dependent Claim
24 words
A process for producing a melt-spun polyamide fiber, comprising admixing an additive mixture as defined in claim 2 with a fiber-forming polyamide before spinning.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |