US2957747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing crimpable polyamide filaments
Assignee: EIDP Inc
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Filing: 1958-07-22
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Granted: 1960-10-25
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Expires: 1978-07-22
Abstract
No abstract record available.
Inventors
- 👤 John F Bowling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:32
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING A YARN CONTAINING AT LEAST 90 MOL PERCENT OF POLYHEXAMETHYLENE ADIPAMIDE WHICH COMPRISES EXTRUDING THE MOLTEN POLYMER THROUGH A SPINNERET, ATTENUATING THE EXTRUDED FLOW FROM THE SPINNERET ORIFICE, SAID FLOW HAVING A JET VELOCITY OF FROM ABOUT 1 TO ABOUT 100 YARDS PER MINUTE, IN ITS AREA OF NON-TACKY IMPRESSIONABLE TRACTABILITY, BY FORWARDING, WITHIN A FEW MINUTES AFTER ATTENUATION, THE PORTION OF THE SHAPED YARN FROM BEYOND THE POSITION OF IMPRESSIONABLE TRACTABILITY AT A RATE OF FROM ABOUT 3000 TO ABOUT 6000 YARDS PER MINUTE AND COOLING THE FORWARDED YARN IN A RELAXED STATE TO A TEMPERATURE NOT SUBSTANTIALLY ABOVE ROOM TEMPERATURE.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRODUCING A YARN CONTAINING AT LEAST 90 MOL PERCENT OF POLYHEXAMETHYLENE ADIPAMIDE WHICH COMPRISES EXTRUDING THE MOLTEN POLYMER THROUGH A SPINNERET, ATTENUATING THE EXTRUDED FLOW FROM THE SPINNERET ORIFICE, SAID FLOW HAVING A JET VELOCITY OF FROM ABOUT 1 TO ABOUT 100 YARDS PER MINUTE, IN ITS AREA OF NON-TACKY IMPRESSIONABLE TRACTABILITY, BY FORWARDING, WITHIN A FEW MINUTES AFTER ATTENUATION, THE PORTION OF THE SHAPED YARN FROM BEYOND THE POSITION OF IMPRESSIONABLE TRACTABILITY AT A RATE OF FROM ABOUT 3000 TO ABOUT 6000 YARDS PER MINUTE AND COOLING THE FORWARDED YARN IN A RELAXED STATE TO A TEMPERATURE NOT SUBSTANTIALLY ABOVE ROOM TEMPERATURE.
References Cited (Backward Citations)
US2252684A
Cited
US2604689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |