US3611701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of dyed crimped yarns
Assignee: Bayer AG
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Filing: 1969-11-20
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Granted: 1971-10-12
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Expires: 1989-11-20
Abstract
Abstract THE INVENTION RELATES TO A TEXTURING PROCESS FOR THE PRODUCTION OF DYED, CRIMPED YARNS FROM ENDLESS FILAMENTS BY THE FALSE-TWIST METHOD. THE ENDLESS FILAMENTS CONSIST OF SYNTHETIC POLYMERS, SUCH AS HIGH-MOLECULAR WEIGHT LINEAR POLYAMIDES OR HIGH-MOLECULAR WEIGHT LINEAR POLYESTERS. THE PROCESS IS CARRIED OUT BY MAKING UP THE ENDLESS SYNTHETIC FILAMENTS ISSUSING FROM A SPINNING STATION BY KNITTING INTO A TUBULAR STRUCTURE, BEING DYED IN THAT FORM, THE FILAMENTS THEN BEING STRETCHED AND FALSE-TWIST-CRIMPED. THE KNITTING MACHINE REQUIRED TO PRODUCE THE TUBE IS ARRANGED IMMEDIATELY BENEATH THE SPINNING STATION. THE FALSETWISTING IS EFFECTED AT TEMPERATURES OF ABOVE 100*C.
Inventors
- 👤 Herbert Scherzberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:56
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/002; D02G1/02; D02G1/0206; D02J; D02J1/00; D02J1/22; D02J1/221; D02J1/229; D04; D04B; D04B1/00; D04B1/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |