Patent US2456853A successfully refreshed from Google Patents.
Patent US2918347A successfully refreshed from Google Patents.
US2918347A
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Process for melt-spinning polyamides into low humidity atmosphere
Assignee: SNIA Viscosa SpA
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Filing: 1957-05-17
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Granted: 1959-12-22
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Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
- 👤 Notarbartolo Luigi
- 👤 Belgioioso Gaetano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:39
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/08; D01D5/088; D01D5/092; D01F; D01F6/00; D01F6/58; D01F6/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE MELT-SPINNING OF YARNS OF SYNTHETIC LINEAR POLYMERS PRODUCED FROM THE GROUP CONSISTING OF AMINOUNDECANOIC ACID AND HEXAMETHYLENE DIAMINE ADIPATE, COMPRISING DIRECTLY A STREAM OF A COOLING GAS ONTO THE THREAD IMMEDIATELY AFTER THE SAME ISSUES, FROM THE SPINNERET AND SUBSEQUENTLY, BUT PRIOR TO APPLYING SIZING TO THE THREAD, PASSING THE THREAD THROUGH A SPACE HEATED AT A TEMPERATURE BETWEEN 40*-60*C. FOR A FRACTION OF A SECOND WITHOUT HUMIDIFYING THE THREAD, THE TEMPERATURE OF THE ROOM IN WHICH THE THREAD IS TO BE WOUND UP BEING LESS THAN THE SPACE TEMPERATURE, THE HUMIDITY OF SAID HEATED SPACE BEING NOT HIGHER THAN THAT OF SAID WINDING ROOM.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE MELT-SPINNING OF YARNS OF SYNTHETIC LINEAR POLYMERS PRODUCED FROM THE GROUP CONSISTING OF AMINOUNDECANOIC ACID AND HEXAMETHYLENE DIAMINE ADIPATE, COMPRISING DIRECTLY A STREAM OF A COOLING GAS ONTO THE THREAD IMMEDIATELY AFTER THE SAME ISSUES, FROM THE SPINNERET AND SUBSEQUENTLY, BUT PRIOR TO APPLYING SIZING TO THE THREAD, PASSING THE THREAD THROUGH A SPACE HEATED AT A TEMPERATURE BETWEEN 40*-60*C. FOR A FRACTION OF A SECOND WITHOUT HUMIDIFYING THE THREAD, THE TEMPERATURE OF THE ROOM IN WHICH THE THREAD IS TO BE WOUND UP BEING LESS THAN THE SPACE TEMPERATURE, THE HUMIDITY OF SAID HEATED SPACE BEING NOT HIGHER THAN THAT OF SAID WINDING ROOM.
References Cited (Backward Citations)
US2289860A
Cited
US2811410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |