US3080209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing acrylonitrile polymer fibers and filaments by wet spinning process
Assignee: Asahi Kasei Corp
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Filing: 1961-10-12
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Granted: 1963-03-05
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Expires: 1981-10-12
Abstract
No abstract record available.
Inventors
- 👤 Fujisaki Yoshisato
- 👤 Ohfuka Toshio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:06
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F11/00; D01F11/04; D01F11/06; D01F6/28; D01F6/38; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN A WET SPINNING METHOD FOR PRODUCING FIBERS OF ACRYLONITRILE POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS OF AT LEAST 85% BY WEIGHT OF ACRYLONITRILE AND UP TO 15% BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMERS COPOLYMERIZABLE THEREWITH THE SAID METHOD INVOLVING DISSOLVING THE POLYMERS IN A NITRIC ACID SOLVENT, EXTRUDING AND SPINNING THE SOLUTION THUS OBTAINED IN A COAGULATING BATH AND DRYING THE SPUN ARTICLE, THE IMPROVEMENT COMPRISING TREATING THE FIBERS WITH A WATER SOLUBLE, UNIVALENT CATIONCONTAINING INORGANIC ACID SALT UNTIL THE UNIVALENT CATION IS INCORPORATED IN THE FIBER TO THE EXTENT OF BETWEEN 0.003 AND 0.02 AND MOL PER 100 GRAM FIBERS, THE SAID TREATMENT BEING EFFECTED AFTER CARRYING OUT THE COAGULATION AND BEFORE REDUCING THE WATER CONTENTS OF THE FIBERS IN THE DRYING TO BELOW 15% AND THE SAID UNIVALENT CATION BEING SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL IONS.
Claim 2
Dependent Claim
148 words
IN A WET SPINNING METHOD FOR PRODUCING FIBERS OF ACRYLONITRILE POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS OF AT LEAST 85% BY WEIGHT OF ACRYLONITRILE AND UP TO 15% BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMERS COPOLYMERIZABLE THEREWITH THE SAID METHOD INVOLVING DISSOLVING THE POLYMERS IN A NITRIC ACID SOLVENT, EXTRUDING AND SPINNING THE SOLUTION THUS OBTAINED IN A COAGULATING BATH AND DRYING THE SPUN ARTICLE, THE IMPROVEMENT COMPRISING TREATING THE FIBERS WITH A WATER SOLUBLE, UNIVALENT CATIONCONTAINING INORGANIC ACID SALT UNTIL THE UNIVALENT CATION IS INCORPORATED IN THE FIBER TO THE EXTENT OF BETWEEN 0.003 AND 0.02 AND MOL PER 100 GRAM FIBERS, THE SAID TREATMENT BEING EFFECTED AFTER CARRYING OUT THE COAGULATION AND BEFORE REDUCING THE WATER CONTENTS OF THE FIBERS IN THE DRYING TO BELOW 15% AND THE SAID UNIVALENT CATION BEING SELECTED FROM THE GROUP CONSISTING OF AMMONIUM AND ALKALI METAL IONS.
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) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |