US2716586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wet spinning of acrylonitrile polymers
Assignee: Industrial Rayon Corp
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Filing: 1951-09-08
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Granted: 1955-08-30
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Expires: 1971-09-08
Abstract
No abstract record available.
Inventors
- 👤 John M Terpay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:35
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F13/00; D01F13/04; D01F6/28; D01F6/38; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y02P70/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
THE METHOD OF FORMING AN ACRYLONITRILE POLYMER FIBER COMPRISING THE STEPS, FORMING A SPINNING SOLUTION COMPRISING ETHYLENE CARBONATE, WATER IN AN AMOUNT BETWEEN ABOUT 2.5% AND 18.5% BY WEIGHT AND A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST ABOUT 80% BY WEIGHT OF ACRYLONITRILE; EXTRUDING THE RESULTING SPINNING SOLUTION INTO A COAGULATING LIQUID COMPRISING WATER AND ETHYLENE CARBONATE; MAINTAINING THE ETHYLENE CARBONATE CONCENTRATION IN SAID COAGULATING LIQUID BETWEEN ABOUT 10% AND 50% BY WEIGHT, AND THE TOTAL OF THE WATER AND THE ETHYLENE CARBONATE IN SAID COAGULATING LIQUID COMPRISING AT LEAST ABOUT 95% BY WEIGHT THEREOF.
Claim 2
Independent Claim
99 words
THE METHOD OF FORMING AN ACRYLONITRILE POLYMER FIBER COMPRISING THE STEPS, FORMING A SPINNING SOLUTION COMPRISING ETHYLENE CARBONATE, WATER IN AN AMOUNT BETWEEN ABOUT 2.5% AND 18.5% BY WEIGHT AND A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST ABOUT 80% BY WEIGHT OF ACRYLONITRILE; EXTRUDING THE RESULTING SPINNING SOLUTION INTO A COAGULATING LIQUID COMPRISING WATER AND ETHYLENE CARBONATE; MAINTAINING THE ETHYLENE CARBONATE CONCENTRATION IN SAID COAGULATING LIQUID BETWEEN ABOUT 10% AND 50% BY WEIGHT, AND THE TOTAL OF THE WATER AND THE ETHYLENE CARBONATE IN SAID COAGULATING LIQUID COMPRISING AT LEAST ABOUT 95% BY WEIGHT THEREOF.
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) | 1958-08-29 | 1959-02-28 | 1959-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-29 | 1963-02-28 | 1963-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-29 | 1967-02-28 | 1967-08-30 | $7700.00 | Window Closed / Lapsed |