US3779853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimpable bicomponent filament
Assignee: EIDP Inc
•
Filing: 1972-01-05
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Granted: 1973-12-18
•
Expires: 1992-01-05
Abstract
Abstract Improved bicomponent filaments for use in stretch hosiery are composed of a poly(hexamethylenedodecanedioamide) component and an N-alkyl substituted poly(hexamethylenedodecanedioamide) component. The filament are strong and develop a high crimp with high crimp recovery during knitting and subsequent hot finishing treatments.
Inventors
- 👤 E Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:37
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10S; Y10S264/00; Y10S264/26; Y10S57/00; Y10S57/905; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2929; Y10T428/2931; Y10T442/00; Y10T442/40; Y10T442/444
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
A composite nylon filament as defined in claim 1, wherein said alkyl group is an ethyl group.
Claim 2
Dependent Claim
17 words
A composite nylon filament as defined in claim 1, wherein said alkyl group is an n-butyl group.
Claim 3
Dependent Claim
14 words
The composite nylon filament defined in claim 1, having said components in side-by-side relationship.
Claim 4
Dependent Claim
21 words
The composite nylon filament defined in claim 1, having a crimp characterized by a crimp recovery of at least 85 percent.
Claim 5
Dependent Claim
16 words
Composite nylon filaments as defined in claim 1, wherein the filaments are in substantially uncrimped form.
Claim 6
Dependent Claim
19 words
A fabric knitted from a plurality of the filaments defined in claim 8 and then heated to develop crimp.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |