Patent US3558419A successfully refreshed from Google Patents.
US3558419A
Expired / Lapsed
US
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Composite filaments and fibers
Assignee: Toray Industries Inc
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Filing: 1968-05-27
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Granted: 1971-01-26
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Expires: 1988-05-27
Abstract
Abstract COMPOSITE FIBERS IN WHICH AT LEAST TWO POLYMERIC COMPONENTS ARE ARRANGED IN INTIMATE MUTUAL CONTACT ALONG THE FIBER LENGTH, AND AT LEAST ONE OF THE SAID COMPONENTS IS A FIBER-FORMING POLYESTER, AND THE OTHER OF THE SAID COMPONENTS IS A POLYETHER-POLYAMIDE-BLOCK-COPOLYMER COMPOSED OF LINEAR POLYAMIDE SEGMENTS AND POLYALKYLENE ETHER SEGMENTS, THE POLYALKYLENE ETHER SEGMENT CONTENT OF THE COPLYMER BEING 3 TO 85% BY WEIGHT, AND THE POLYALKYLENE ETHER SEGMENT CONTENT OF THE COMPOSITE FIVERS BEING 0.3 TO 30% BY WEIGHT.
Inventors
- 👤 Kaoru Okazaki
- 👤 Asaharu Nakagawa
- 👤 Kenji Sugii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:25
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2931; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |