US4713289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-dispersible synthetic fiber
Assignee: Invista North America LLC
•
Filing: 1986-03-27
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Granted: 1987-12-15
•
Expires: 2006-03-27
Abstract
Abstract Water-dispersible synthetic fiber of cruciform cross-section to promote dispersibility, and so better uniformity, more opacity, good permeability and an attractive flannel-like hand to the resulting wet-laid fabrics.
Inventors
- 👤 Donald A. Shiffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/20; D21H5/207; D21H13/00; D21H13/10; D21H13/20; D21H13/24; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/298
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
25 words
Water-dispersible polyester fiber provided with a water-dispersing coating in sufficient amount to render the fiber water-dispersible, characterized in that the fibers are of cruciform cross-section.
Claim 2
Dependent Claim
25 words
Water-dispersible polyester fiber provided with a water-dispersing coating in sufficient amount to render the fiber water-dispersible, characterized in that the fibers are of cruciform cross-section.
Claim 3
Dependent Claim
16 words
Fiber as claimed in claim 1, wherein the denier is from about 0.5 to about 20.
Claim 4
Dependent Claim
16 words
Fiber as claimed in claim 1, of cut length from about 5 to about 90 mm.
Claim 5
Dependent Claim
18 words
Fiber as claimed in claim 3, wherein the length diameter ratio is from about 100:1 to about 2000:1.
Claim 6
Dependent Claim
16 words
Water-dispersible fiber as claimed in claim 4, in the form of a package of cut fiber.
Claim 7
Dependent Claim
11 words
Polyester fiber according to claim 1, consisting essentially of poly(ethylene terephthalate).
Claim 8
Dependent Claim
41 words
Polyester fiber according to claim 1, coated with a water-dispersible coating consisting essentially of a segmented copolyester of poly(ethylene terephthalate) repeat units and poly(oxyalkylene) groups derived from a poly(oxyalkylene)glycol having an average molecular weight in the range of 300 to 6000.
Claim 9
Dependent Claim
20 words
Polyester filaments essentially as claimed in claim 7, except that they are in the form of a continuous filamentary tow.
Claim 10
Dependent Claim
19 words
Water-dispersible fiber according to claim 1, wherein the cruciform cross-section is of proportions essentially as shown in FIG. 1.
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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) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |