US3667207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimpable composite polyamide yarn
Assignee: EIDP Inc
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Filing: 1970-05-01
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Granted: 1972-06-06
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Expires: 1990-05-01
Abstract
Abstract A crimpable bicomponent filament in which one component is a polyamide and the other a random copolyamide containing specified percentages of three polymeric units. The different units and their concentrations are 70-82 percent hexamethylene adipamide, 13-25 percent caproamide and 5-17 percent hexamethylene dodecanedioamide. Yarns of one or more such filaments are particularly useful in the manufacture of hosiery because of their high crimpability, high strength and low shrinkage in the fabric.
Inventors
- 👤 Victor Ralph Ben
- 👤 Peter Steven Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:35
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/36; D; D01; D01F; D01F8/00; D01F8/04; D01F8/12; Y; Y10; Y10S; Y10S57/00; Y10S57/905; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
20 words
The yarn of claim 1, said filament being characterized by a shrinkage in the fabric of less than 4 percent.
Claim 2
Dependent Claim
17 words
The yarn of claim 2, said filament having an after boil-off tenacity of at least 4.0 grams/denier.
Claim 3
Dependent Claim
15 words
The yarn of claim 2, said copolyamide having a DTA melting point of 210*-225* C.
Claim 4
Dependent Claim
24 words
The yarn of claim 2, said one component being polyhexamethylene adipamide, said copolyamide containing the three different units in a ratio of about 75:15:10.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |