US3330899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming filaments from polyamide and styrene polymer mixtures
Assignee: Kurashiki Rayon Co Ltd
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Filing: 1966-06-15
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Granted: 1967-07-11
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Expires: 1986-06-15
Abstract
No abstract record available.
Inventors
- 👤 Fukushima Osamu
- 👤 Hayanami Hiroshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; C; C08; C08L; C08L25/00; C08L25/02; C08L25/04; C08L77/00; D01D5/24; D01D5/247; D01F; D01F6/00; D01F6/44; D01F6/56; D01F6/88; D01F6/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN THE METHOD OF MANUFACTURING FILAMENT FROM A MIXTURE OF POLYAMIDE AND STYRENE POLYMER BY MELT SPINNING AND SUBSEQUENT TWO STAGE DRAWING, THE IMPROVEMENT WHICH COMPRISES: (A) MELTING A MIXTURE CONSISTING OF POLYAMIDE IN AN AMOUNT OF 33 TO 60 PERCENT BASED ON THE WEIGHT OF SAID MIXTURE AND STYRENE POLYMER IN AN AMOUNT OF 67 TO 40 PERCENT BASED ON THE WEIGHT OF SAID MIXTURE; (B) EXTRUDING THE MELTING THROUGH A NOZZLE INTO THE FORM OF FILAMENT, SAID NOZZLE HAVING HOLES IN A CONCENTRIC ARRANGEMENT; (C) COOLING SAID FILMENT IN A QUENCHING ZONE DISPOSED WITHIN A DISTANCE RANGE OF 20 TO 50 MM. FROM THE NOZZLE SURFACE, SAID QUENCHING ZONE BEING COOLED TO ANY TEMPERATURE WITHIN THE RANGE OF 100 TO 20*C. BY THE INJECTION OF A STREAM OF COOLING MEDIUM HAVING AN ANGLE OF 40 TO 90* TO THE CENTER LINE CONNECTING THE NOZZLE CENTER AND NOZZLE HOLES IN THE HORIZONTAL DIRECTION AND HAVING LINE VELOCITY OF MORE THAN 4 M./MIN.; THEREAFTER
Claim 2
Dependent Claim
164 words
IN THE METHOD OF MANUFACTURING FILAMENT FROM A MIXTURE OF POLYAMIDE AND STYRENE POLYMER BY MELT SPINNING AND SUBSEQUENT TWO STAGE DRAWING, THE IMPROVEMENT WHICH COMPRISES: (A) MELTING A MIXTURE CONSISTING OF POLYAMIDE IN AN AMOUNT OF 33 TO 60 PERCENT BASED ON THE WEIGHT OF SAID MIXTURE AND STYRENE POLYMER IN AN AMOUNT OF 67 TO 40 PERCENT BASED ON THE WEIGHT OF SAID MIXTURE; (B) EXTRUDING THE MELTING THROUGH A NOZZLE INTO THE FORM OF FILAMENT, SAID NOZZLE HAVING HOLES IN A CONCENTRIC ARRANGEMENT; (C) COOLING SAID FILMENT IN A QUENCHING ZONE DISPOSED WITHIN A DISTANCE RANGE OF 20 TO 50 MM. FROM THE NOZZLE SURFACE, SAID QUENCHING ZONE BEING COOLED TO ANY TEMPERATURE WITHIN THE RANGE OF 100 TO 20*C. BY THE INJECTION OF A STREAM OF COOLING MEDIUM HAVING AN ANGLE OF 40 TO 90* TO THE CENTER LINE CONNECTING THE NOZZLE CENTER AND NOZZLE HOLES IN THE HORIZONTAL DIRECTION AND HAVING LINE VELOCITY OF MORE THAN 4 M./MIN.; THEREAFTER
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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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |