Patent US3645085A successfully refreshed from Google Patents.
US3645085A
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Hairy lustrous yarn
Assignee: Celanese Canada Inc
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Filing: 1969-11-13
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Granted: 1972-02-29
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Expires: 1989-11-13
Abstract
Abstract A hairy lustrous yarn of isotactic polypropylene which has a rectangular cross section and a luster index above 2. The method of making same which comprises: A. MELT EXTRUDING A MELT-EXTRUDABLE ISOTACTIC POLYPROPYLENE BLEND IN THE FORM OF A RIBBON. B. IMMEDIATELY GAS QUENCHING THE RIBBON TO A TEMPERATURE ABOVE THE GLASS TRANSITION TEMPERATURE OF ISOTACTIC POLYPROPYLENE. C. ATTENUATING THE QUENCHED RIBBON AT A TEMPERATURE ABOVE SAID GLASS TRANSITION TEMPERATURE. D. GAS FIBRILLATING THE ATTENUATED RIBBON.
Inventors
- 👤 Nestor Sylvain Rassart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:35
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; D01F; D01F6/00; D01F6/02; D01F6/04; Y; Y10; Y10S; Y10S264/00; Y10S264/08; Y10S264/47; Y10S57/00; Y10S57/907; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2973; Y10T428/2978; Y10T428/298
Claims Analysis
Total Claims: 0
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |