Patent US4331732A successfully refreshed from Google Patents.
US4331732A
Expired / Lapsed
US
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Acrylic fibers having improved moisture transport properties
Assignee: Solutia Inc
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Filing: 1978-05-24
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Granted: 1982-05-25
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Expires: 1998-05-24
Abstract
Abstract An acrylic fiber having dispersed therein 2 to 10 weight percent of a colloidal silica having an average particle size of about 1 to 4 microns, with a mean particle size of 2-3, preferably about 2, microns. This acrylic fiber has excellent whiteness and moisture transport characteristics and fabrics made from it have an improved crispness of hand.
Inventors
- 👤 George Palethorpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:15
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/2967
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
59 words
A fiber having improved moisture transport characteristics, said fiber being made of at least 85 weight percent acrylonitrile and up to 15 weight percent of another mono-olefinic monomer copolymerized with said acrylonitrile, said fiber containing 2 to 10 weight percent of silica having an average particle size of 1 to 4 microns, said silica being dispersed through the fiber.
Claim 2
Dependent Claim
59 words
A fiber having improved moisture transport characteristics, said fiber being made of at least 85 weight percent acrylonitrile and up to 15 weight percent of another mono-olefinic monomer copolymerized with said acrylonitrile, said fiber containing 2 to 10 weight percent of silica having an average particle size of 1 to 4 microns, said silica being dispersed through the fiber.
Claim 3
Dependent Claim
14 words
The fiber of claim 1 wherein the mean particle size is about 2-3 microns.
Claim 4
Dependent Claim
14 words
The fiber of claim 2 wherein the mean particle size is about 2 microns.
Claim 5
Dependent Claim
17 words
The fiber of claim 1 wherein the fiber contains 5 to 10 weight percent of said silica.
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) | 1985-05-24 | 1985-11-23 | 1986-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-24 | 1989-11-23 | 1990-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-24 | 1993-11-23 | 1994-05-25 | $7700.00 | Window Closed / Lapsed |