Patent US3576907A successfully refreshed from Google Patents.
US3576907A
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US
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Method of producing mixed filaments of polyimides and polyether-polyesters
Assignee: Kanegafuchi Spinning Co Ltd
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Filing: 1968-01-22
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Granted: 1971-04-27
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Expires: 1988-01-22
Abstract
Abstract PRODUCTION OF MIXED FILAMENTS, WHICH COMPRISES MELT BLENDING FIBER FORMING POLYAMIDE COMPONENT, POLYESTERETHER COMPONENT AND POLYESTER COMPONENT, AN AMOUNT OF THE POLYAMIDE COMPONENT BEING 97 TO 50% BY WEIGHT BASED ON THE TOTAL AMOUNT OF THE MIXTURE, A RATIO OF THE POLYESTER COMPONENT TO THE POLYESTER/ETHER COMPONENT BEING 0/100-95/5 (BY WEIGHT) AND SPINNING AND DRAWING THE RESULTING BLEND. THE RESULTING MIXED FILAMENTS HAVE HIGHLY IMPROVED TENACITY, DYEING AFFINITY, ELASTICITY, INSTANT RESILIENCE AND ELASTICITY RECOVERING PERCENTAGE FOR ELONGATION, AND A LOW PERMANENT DEFORMATION. THE DISPERSIBILITY, SPINNABILITY AND DRAWABILITY ARE EXCELLENT IN SAID PRODUCTION.
Inventors
- 👤 Isao Kimura
- 👤 Fumimaro Ogata
- 👤 Katsuhiko Nagamine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:27
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L67/025; C08L77/00; C08L77/02; C08L77/06; D; D01; D01F; D01F6/00; D01F6/88; D01F6/90
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |