US4293614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimped polyester filament
Assignee: Solutia Inc
•
Filing: 1979-11-02
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Granted: 1981-10-06
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Expires: 1999-11-02
Abstract
Abstract Crimped side-by-side bicomponent filaments consisting of a polyester and CaF 2 are produced in whichthe CaF 2 is dispersed in only one of the components.
Inventors
- 👤 LeMoyne W. Plischke
- 👤 Harold M. Familant
- 👤 Darrell A. Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:38
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2927; Y10T428/2929; Y10T428/2931; Y10T428/2973
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A melt spun filament having a crimp level of at least 5 crimps per inch and being composed of two polyester components arranged in a side-by-side relation, wherein the polyester of one component contains CaF 2 uniformly dispersed therein at a concentration of at least 200 parts per million based on the weight of the polyester of said component and the polyester of the other component contains no CaF 2 and wherein the weight ratio of the CaF 2 -containing component to the other component is 5:95 to 70:30, said filament being characterized in that the polyester of both components is of the same chemical structure and thermal history.
Claim 2
Dependent Claim
109 words
A melt spun filament having a crimp level of at least 5 crimps per inch and being composed of two polyester components arranged in a side-by-side relation, wherein the polyester of one component contains CaF 2 uniformly dispersed therein at a concentration of at least 200 parts per million based on the weight of the polyester of said component and the polyester of the other component contains no CaF 2 and wherein the weight ratio of the CaF 2 -containing component to the other component is 5:95 to 70:30, said filament being characterized in that the polyester of both components is of the same chemical structure and thermal history.
Claim 3
Dependent Claim
14 words
The filament of claim 1 wherein the weight ratio is between 35:65 and 65:35.
Claim 4
Dependent Claim
11 words
The filament of claim 2 wherein the polyester is polyethylene terephthalate.
Claim 5
Dependent Claim
16 words
The filament of claim 3 having a crimp level of at least 10 crimps per inch.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |