US3124629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of shaped objects of acrylonitrile
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:37
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D01F6/40; D01F6/44; D01F6/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING A FILAMENT FROM AN ACRYLONITRILE POLYMER WHICH COMPRISES DISSOLVING SAID POLYMER IN A SOLVENT SELEACTED FROM THE GROUP CONSISTING OF N,N-DIMETHYLACETAMIDE AND N,N-DIMETHYLFORMAMIDE, EXTRUDING THE RESULTING SOLUTION THROUGH A SHAPED ORIFICE IMMERSED IN A COAGULATING BATH CONSISTING ESSENTIALLY OF POLYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF 200-6000, LESS THAN 10 PECENT WATER, AND UP TO 20 PERCENT OF THE SELECTED SOLVENT, THEREBY PRECIPITATING SAID POLYMER FROM ITS SOLUTION IN THE FORM OF A FILAMENT, WITHDRAWING SAID FILAMENT FROM SAID COAGULATING BATH, STRETCHING SAID FILAMENT TO A SUBSTANTIAL EXTENT, AND DRYING SID FILAMENT, WHEREBY A DENSE FILAMENT HAVING A SMOOTH SURFACE IS FORMED.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRODUCING A FILAMENT FROM AN ACRYLONITRILE POLYMER WHICH COMPRISES DISSOLVING SAID POLYMER IN A SOLVENT SELEACTED FROM THE GROUP CONSISTING OF N,N-DIMETHYLACETAMIDE AND N,N-DIMETHYLFORMAMIDE, EXTRUDING THE RESULTING SOLUTION THROUGH A SHAPED ORIFICE IMMERSED IN A COAGULATING BATH CONSISTING ESSENTIALLY OF POLYALKYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF 200-6000, LESS THAN 10 PECENT WATER, AND UP TO 20 PERCENT OF THE SELECTED SOLVENT, THEREBY PRECIPITATING SAID POLYMER FROM ITS SOLUTION IN THE FORM OF A FILAMENT, WITHDRAWING SAID FILAMENT FROM SAID COAGULATING BATH, STRETCHING SAID FILAMENT TO A SUBSTANTIAL EXTENT, AND DRYING SID FILAMENT, WHEREBY A DENSE FILAMENT HAVING A SMOOTH SURFACE IS FORMED.
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) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |