US4271233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimped polyamide filament
Assignee: Solutia Inc
•
Filing: 1979-11-02
•
Granted: 1981-06-02
•
Expires: 1999-11-02
Abstract
Abstract Crimped side-by-side bicomponent filaments consisting of a polyamide and CaF 2 are produced in which the CaF 2 is dispersed in only one of the components.
Inventors
- 👤 LeMoyne W. Plischke
- 👤 William M. Baggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:29
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; 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
74 words
A melt spun crimped side-by-side bicomponent filament consisting essentially of a polyamide and CaF 2 and having a crimp level of at least 5 crimps per inch, wherein said CaF 2 is uniformly dispersed in one of the components at a concentration of at least 200 parts per million by weight of said one component and the weight ratio of the CaF 2 -containing component to the other component is between 5:95 and 70:30.
Claim 2
Dependent Claim
74 words
A melt spun crimped side-by-side bicomponent filament consisting essentially of a polyamide and CaF 2 and having a crimp level of at least 5 crimps per inch, wherein said CaF 2 is uniformly dispersed in one of the components at a concentration of at least 200 parts per million by weight of said one component and the weight ratio of the CaF 2 -containing component to the other component is between 5:95 and 70:30.
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 polyamide is polyhexamethylene adipamide.
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) | 1984-06-01 | 1984-12-01 | 1985-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-01 | 1988-12-01 | 1989-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-01 | 1992-12-01 | 1993-06-02 | $7700.00 | Window Closed / Lapsed |