Patent US4707409A successfully refreshed from Google Patents.
US4707409A
Expired / Lapsed
US
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Spinneret orifices and four-wing filament cross-sections therefrom
Assignee: Clemson University Research Foundation
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Filing: 1986-07-29
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Granted: 1987-11-17
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Expires: 2006-07-29
Abstract
Abstract Spinneret having an orifice defined by two intersecting slots and each intersecting slot in turn defined by three quadrilateral sections connected in series: the middle quadrilateral section of each intersecting slot having a greater width than the other two quadrilateral sections of the same intersecting slot and intersecting the other intersecting slot at its middle quadrilateral section to form therewith a generally X-shaped opening, with each of the other two quadrilateral sections of each intersecting slot being longer than the middle quadrilateral section of each intersecting slot; and a four-winged filament cross-section extruded through the aforedescribed spinneret orifice.
Inventors
- 👤 Bobby M. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:07
CPC Classifications
A; A24; A24D; A24D3/00; A24D3/06; A24D3/08; D; D01; D01D; D01D5/00; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2973
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
120 words
A filament comprising a central body section and having a first and second pair of wing members extending from and along the length of said continuous body section, said first pair of wing members projecting from one side of said body section and said second pair of wing members projecting from the opposite side of said body section, said central body comprising about 15% to about 60% of the total mass of the filament and said wing members comprising about 85% to about 40% of the total mass of said filament, said filament further having first peripheral concave surfaces between the wing members of each pair of wing members and second peripheral concave surfaces between each pair of wing members.
Claim 2
Dependent Claim
120 words
A filament comprising a central body section and having a first and second pair of wing members extending from and along the length of said continuous body section, said first pair of wing members projecting from one side of said body section and said second pair of wing members projecting from the opposite side of said body section, said central body comprising about 15% to about 60% of the total mass of the filament and said wing members comprising about 85% to about 40% of the total mass of said filament, said filament further having first peripheral concave surfaces between the wing members of each pair of wing members and second peripheral concave surfaces between each pair of wing members.
Claim 3
Dependent Claim
25 words
A continuous filament as defined by claim 1 and wheren the wing members of each said pair of wing members diverge away from each other.
Claim 4
Dependent Claim
24 words
A continuous filament as defined by claim 1 and wherein the wing members of each said pair of wing members converge toward each other.
Claim 5
Dependent Claim
26 words
A continuous filament as defined by claim 1 wherein each of said second peripheral surfaces includes concave surfaces that are smaller than said first concave surface.
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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |