US3316612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of drawing and crimping asymmetrically quenched polyester filaments to provide a compact ribbon-like tow for shipping and enhanced bulk in end-products
Assignee: EIDP Inc
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Filing: 1965-10-12
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Granted: 1967-05-02
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Expires: 1985-10-12
Abstract
No abstract record available.
Inventors
- 👤 Stump William Lester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:42
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/23; D02; D02G; D02G1/00; D02G1/12; D02G1/127; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
IN THE PROCESS OF FORMING FILAMENTS OF CRYSTALLIZABLE LINEAR CONDENSATION POLYESTER MATERIAL BY EXTRUDING THE MOLTEN POLYESTER IN THE FORM OF FILAMENTS, ASYMMETRICALLY QUENCHING THE EXTRUDED POLYESTER WITH FLUID TO FORM FILAMENTS HAVING AN ASYMMETRIC BIREFRINGENCE DIFFERENTIAL ACROSS THE FILAMENT DIAMETERS AND DRAWING A TOW OF SAID FILAMENTS AT A DRAW RATIO OF ABOUT 2 TO 5 TIMES TO ORIENT THE FILAMENTS, THE IMPROVEMENT OF MAINTAINING THE DRAW FILAMENTS UNDER SUFFICIENT TENSION TO KEEP THEM PARALLEL, AND MECHANICALLY CRIMPING THE TOW OF PARALLEL FILAMENTS TO FORM A RIBBON-LIKE TOW OF SUBSTANTIALLY PARALLEL FILAMENTS HAVING A TWO-DIMENSIONAL CRIMP.
Claim 2
Dependent Claim
97 words
IN THE PROCESS OF FORMING FILAMENTS OF CRYSTALLIZABLE LINEAR CONDENSATION POLYESTER MATERIAL BY EXTRUDING THE MOLTEN POLYESTER IN THE FORM OF FILAMENTS, ASYMMETRICALLY QUENCHING THE EXTRUDED POLYESTER WITH FLUID TO FORM FILAMENTS HAVING AN ASYMMETRIC BIREFRINGENCE DIFFERENTIAL ACROSS THE FILAMENT DIAMETERS AND DRAWING A TOW OF SAID FILAMENTS AT A DRAW RATIO OF ABOUT 2 TO 5 TIMES TO ORIENT THE FILAMENTS, THE IMPROVEMENT OF MAINTAINING THE DRAW FILAMENTS UNDER SUFFICIENT TENSION TO KEEP THEM PARALLEL, AND MECHANICALLY CRIMPING THE TOW OF PARALLEL FILAMENTS TO FORM A RIBBON-LIKE TOW OF SUBSTANTIALLY PARALLEL FILAMENTS HAVING A TWO-DIMENSIONAL CRIMP.
References Cited (Backward Citations)
US2715309A
Cited
US3164882A
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US2917784A
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US2917806A
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US3050821A
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US3099064A
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US3134833A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |