US3669917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolyamide fibers of reduced stickiness containing a normal paraffin
Assignee: SNIA Viscosa SpA
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Filing: 1970-07-27
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Granted: 1972-06-13
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Expires: 1990-07-27
Abstract
Abstract A copolyamide fiber of reduced stickiness which consists essentially of a fibers forming copolyamide consisting of 70 - 95 percent by weight of polycaproamide polyhexamethylene adipamide and 30 - 5 percent by weight of at least one of comonomers copolymerizable therewith and from 0.01 to 5 percent by weight, based on the copolyamide, of at least one normal paraffin selected from the group consisting of methane series hydrocarbons represented by the formula CnH2n 2, wherein n is an integer of from 14 to 70, dispersed homogeneously throughout said copolyamide.
Inventors
- 👤 Satoshi Ando
- 👤 Yusaku Tanaka
- 👤 Minoru Kojima
- 👤 Kyoichi Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
The copolyamide fiber as claimed in claim 1, wherein said copolymerizable comonomer is hexamethylene isophthalamide, hexamethylene terephthalamide or hexamethylene sebacamide.
Claim 2
Dependent Claim
48 words
The copolyamide fiber as claimed in claim 1, wherein said fiber forming copolyamide is a terpolymer consisting of at least 70 percent by weight of polycaproamide, 5 to 15 percent by weight of polyhexamethylene isophthalamide and 3 to 15 percent by weight of the other polyamide forming component.
Claim 3
Dependent Claim
19 words
The copolyamide fiber as claimed in claim 3, wherein said terpolymer is polycapramide/polyhexamethylene isophthalamide/polyhexamethylene adipamide or polycaproamide/polyhexamethylene isophthalamide/polyhexamethylene sebacamide.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |