Composite polyester textile fibers
Abstract
Abstract HELICALLY CRIMPABLE AND CRIMPED BICOMPONENT FILAMENTS COMPRISING A LATERALLY ECCENTRIC ASSEMBLY OF AT LEAST TWO A PARTLY CRYSTALLINE POLYESTER IN WHICH THE CHEMICAL REPEATUNITS OF ITS CRYSTALLINE REGION ARE IN A NON-EXTENDED STABLE CONFORMATION THAT DOES NOT EXCEED NINETY PERCENT OF THE LENGTH OF THE CONFORMATION OF ITS FULLY EXTENDED CHEMICAL REPEAT-UNITS AND IS GENERALLY ON THE INSIDE OF THE CRIMP HELICES FORMED WHEN THE ASSEMBLY CRIMPS, WHILE AT LEAST ONE OTHER POLYESTER COMPONENT IS PARTLY CRYSTALLINE AND THE CHEMICAL REPEAT-UNITS OF THE CRYSTALLINE REGION MORE CLOSELY APPROACH THE LENGTH OF THE CONFORMATION OF ITS FULLY EXTENDED CHEMICAL REPEAT-UNITS. YARNS, FABRICS, AND THE LIKE PRODUCED FROM THESE FILAMENTS HAVE A WIDE RANGE OF END USES.
Inventors
- 👤 Evan Franklin Evans
- 👤 Norwin Caley Pierce
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |