US3553803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for crimping and heat-setting of yarns made from synthetic linear high polymers
Assignee: VEB CHEMIEFASERWERK SCHWARZA WILHELM PIECK
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Filing: 1969-01-03
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Granted: 1971-01-12
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Expires: 1989-01-03
Abstract
Abstract PROCESS AND DEVICE FOR CRIMPING AND HEAT-SETTING OF YARNS MADE FROM SYNTHETIC LINEAR HEATER HIGH POLYMERS, ESPECIALLY POLYAMIDES AND POLYESTERS, WHICH COMPRISES EXTENDING THE PATH OF THE YARN BETWEEN THE STRETCHING ZONE AND THE ENTRANCE TO THE CRIMPING ZONE WHILE REDUCING THE HEAT DEVELOPED IN THE STRETCHING OPERATION, THEREAFTER SUBJECTING THE YARN TO COMPRESSION CRIMPING AND HEAT-SETTING THE CRIMPED YARN RELEASED FROM THE CRIMPING ZONE IN A TWO-STAGE OPERATION IN SUBSEQUENT STEPS AT CONTROLLED TEMPERATURES.
Inventors
- 👤 Gerhard Buschmann
- 👤 Erich Mewes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:07
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/127
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |