Patent US2764468A successfully refreshed from Google Patents.
US2764468A
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Method of preparing resilient acrylonitrile polymer fibers
Assignee: EIDP Inc
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Filing: 1952-02-23
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Granted: 1956-09-25
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Expires: 1972-02-23
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:11
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/08; D01F; D01F6/00; D01F6/44; D01F6/54; H; H01; H01K; H01K1/00; H01K1/28; H01K1/34; H01K1/58; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR PRODUCING WOOL-LIKE FILAMENTS WHICH COMPRISES BLENDING A POLYMER OF ACRYLANITRILE, AT LEAST 85% BY WEIGHT OF WHICH IS DERIVED FROM ACRYLONITRILE, WITH A PLASTICIZER FOR SAID POLYMER TO PRODUCE A BLEND CONTAINING ABOUT 30% TO ABOUT 60% OF SAID PLASTICIZER; EXTRUDING, BY APPLICATION OF HEAT AND PRESSURE, SAID BLEND THROUGH A SHAPED ORIFICE INTO AN INERT ATMOSPHERE; COOLING THE RESULTANT FILAMENTS AND PULLING THEM AWAY FROM SAID ORIFICE AT A FORWARDING VELOCITY OF THE SOLIDIFIED FILAMENT OF AT LEAST THIRTY TIMES THE JET VELOCITY USED IN SAID EXTRUSION; WASHING THE FILAMENTS TO REMOVE SAID PLASTICIZER; AND RELAXING AND SHRINKING THE FILAMENTS AT A TEMPERATURE OF ABOUT 90* C. TO ABOUT 200* C.
Claim 2
Dependent Claim
115 words
A PROCESS FOR PRODUCING WOOL-LIKE FILAMENTS WHICH COMPRISES BLENDING A POLYMER OF ACRYLANITRILE, AT LEAST 85% BY WEIGHT OF WHICH IS DERIVED FROM ACRYLONITRILE, WITH A PLASTICIZER FOR SAID POLYMER TO PRODUCE A BLEND CONTAINING ABOUT 30% TO ABOUT 60% OF SAID PLASTICIZER; EXTRUDING, BY APPLICATION OF HEAT AND PRESSURE, SAID BLEND THROUGH A SHAPED ORIFICE INTO AN INERT ATMOSPHERE; COOLING THE RESULTANT FILAMENTS AND PULLING THEM AWAY FROM SAID ORIFICE AT A FORWARDING VELOCITY OF THE SOLIDIFIED FILAMENT OF AT LEAST THIRTY TIMES THE JET VELOCITY USED IN SAID EXTRUSION; WASHING THE FILAMENTS TO REMOVE SAID PLASTICIZER; AND RELAXING AND SHRINKING THE FILAMENTS AT A TEMPERATURE OF ABOUT 90* C. TO ABOUT 200* C.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |