Patent US5575816A successfully refreshed from Google Patents.
US2585499A
Expired / Lapsed
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Production of shaped articles from acrylonitrile polymers
Assignee: EIDP Inc
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Filing: 1948-07-29
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Granted: 1952-02-12
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Expires: 1968-07-29
Abstract
No abstract record available.
Inventors
- 👤 George M Rothrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:11
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; B; B29; B29C; B29C48/00; B29C48/022; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29K; B29K2033/00; B29K2033/18; B29K2033/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCES FOR THE PRODUCTION OF SHAPED ARTICLES FROM ACRYLONITRILE POLMERS CONTAINING AT LEAST 85% ACRYLONITRILE WHICH COMPRISES IMPREGNATING THE SAID POLYMERS IN SOLID, COMMINUTED FORM WITH FROM 10% TO 80% OF A HYDROXYLATED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, GLYCEROL AND PHENOL; HEATING THE RESULTANT IMPREGNATED POLYMERS IN AN ENCLOSED CHAMBER HAVING AN EXTRUSION ORIFICE; EXERTING PRESSURE ON SAID IMPREGNATED POLYMERS IN SAID CHAMBER, THEREBY EXTRUDING THEM THROUGH SAID ORIFICE; AND SETTING THE RESULTANT SHAPED ARTICLES.
Claim 2
Dependent Claim
80 words
A PROCES FOR THE PRODUCTION OF SHAPED ARTICLES FROM ACRYLONITRILE POLMERS CONTAINING AT LEAST 85% ACRYLONITRILE WHICH COMPRISES IMPREGNATING THE SAID POLYMERS IN SOLID, COMMINUTED FORM WITH FROM 10% TO 80% OF A HYDROXYLATED SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GLYCOL, GLYCEROL AND PHENOL; HEATING THE RESULTANT IMPREGNATED POLYMERS IN AN ENCLOSED CHAMBER HAVING AN EXTRUSION ORIFICE; EXERTING PRESSURE ON SAID IMPREGNATED POLYMERS IN SAID CHAMBER, THEREBY EXTRUDING THEM THROUGH SAID ORIFICE; AND SETTING THE RESULTANT SHAPED ARTICLES.
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |