US3159964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for working up stretched filaments of aromatic polyesters of high molecular weight
Assignee: Hoechst AG
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Filing: 1962-01-30
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Granted: 1964-12-08
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Expires: 1982-01-30
Abstract
No abstract record available.
Inventors
- 👤 Kretsch Rosl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
D; D06; D06P; D06P7/00; D06P7/005; D01; D01F; D01F6/00; D01F6/58; D01F6/62; D02; D02J; D02J1/00; D02J1/22; D02J1/221; D02J1/229; D06L; D06L4/00; D06L4/60; D06L4/657; D06M; D06M13/00; D06M13/10; D06M13/144; D06M13/148; D06M13/152; D06M13/224; D06M13/322; D06M13/368; D06M13/52; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/327; D06M15/333; D06P3/00; D06P3/34; D06P3/52; D06P3/54; D06P5/00; D06P5/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR PROCESSING STRETCHED FILAMENTS OF AROMATIC POLYESTERS OF HIGH MOLECULAR WEIGHT, WHICH COMPRISES TWISTING THE STRETCHED FILAMENTS, PASSING THE TWISTED FILAMENT THROUGH A BATH CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A SOLUTION, DISPERSION AND AN EMULSION OF AT LEAST ONE SUBSTANCE BOILING IN THE RANGE OF 120*C. TO 350C., FEEDING THE FILAMENT TO TWO ROLLERS WHICH SERVE AS FIXED POINTS AND ROTATE AT DIFFERENT SPEEDS THE FIRST ONE OF WHICH IS HEATED, WRAPPING THE FILAMENT SEVERAL TIMES AOURND THE ROLLERS AND HEATING IT BETWEEN THE ROLLERS UNIFORMLY ON ALL SIDES TO A TEMPERATURE WITHIN THE RANGE OF 220*C. TO 350*C. FOR 0.1 T 5 SECONDS, SIMULTANEOUSLY ALLOWING THE FILAMENT TO UNDERGO AN ADJUSTABLE SHRINKAGE OF 5 TO 35%, AGAIN STRETCHING THE FILAMENT AND WINDING IT UP, SAID STEPS BEING CARRIED OUT IN ONE CONTINUOUS OPERATION.
Claim 2
Dependent Claim
141 words
A PROCESS FOR PROCESSING STRETCHED FILAMENTS OF AROMATIC POLYESTERS OF HIGH MOLECULAR WEIGHT, WHICH COMPRISES TWISTING THE STRETCHED FILAMENTS, PASSING THE TWISTED FILAMENT THROUGH A BATH CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A SOLUTION, DISPERSION AND AN EMULSION OF AT LEAST ONE SUBSTANCE BOILING IN THE RANGE OF 120*C. TO 350C., FEEDING THE FILAMENT TO TWO ROLLERS WHICH SERVE AS FIXED POINTS AND ROTATE AT DIFFERENT SPEEDS THE FIRST ONE OF WHICH IS HEATED, WRAPPING THE FILAMENT SEVERAL TIMES AOURND THE ROLLERS AND HEATING IT BETWEEN THE ROLLERS UNIFORMLY ON ALL SIDES TO A TEMPERATURE WITHIN THE RANGE OF 220*C. TO 350*C. FOR 0.1 T 5 SECONDS, SIMULTANEOUSLY ALLOWING THE FILAMENT TO UNDERGO AN ADJUSTABLE SHRINKAGE OF 5 TO 35%, AGAIN STRETCHING THE FILAMENT AND WINDING IT UP, SAID STEPS BEING CARRIED OUT IN ONE CONTINUOUS OPERATION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-08 | 1968-06-08 | 1968-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-08 | 1972-06-08 | 1972-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-08 | 1976-06-08 | 1976-12-08 | $7700.00 | Window Closed / Lapsed |