US2570237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning of acrylonitrile polymers
Assignee: Industrial Rayon Corp
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Filing: 1950-06-17
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Granted: 1951-10-09
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Expires: 1970-06-17
Abstract
No abstract record available.
Inventors
- 👤 Gilman S Hooper
- 👤 Gerald A Mcfarren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:16
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE PROCESS OF PRODUCING SHAPED PARTICLES FROM A POLYMERIC SPINNING SOLUTION COMPRISING AN ACRYLONITRILE POLYMER CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE AND ETHYLENE CARBONATE AS A SOLVENT FOR SAID POLYMER, THE STEPS COMPRISING, EXTRUDING SAID SPINNING SOLUTION INTO A LIQUID COAGULATING MEDIUM COMPRISING ETHYLENE CARBONATE AND A WATER-SOLUBLE POLYALKYLENE GLYCOL HAVING THE FORMULA
Claim 2
Dependent Claim
60 words
IN THE PROCESS OF PRODUCING SHAPED PARTICLES FROM A POLYMERIC SPINNING SOLUTION COMPRISING AN ACRYLONITRILE POLYMER CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE AND ETHYLENE CARBONATE AS A SOLVENT FOR SAID POLYMER, THE STEPS COMPRISING, EXTRUDING SAID SPINNING SOLUTION INTO A LIQUID COAGULATING MEDIUM COMPRISING ETHYLENE CARBONATE AND A WATER-SOLUBLE POLYALKYLENE GLYCOL HAVING THE FORMULA
References Cited (Backward Citations)
US1793649A
Cited
US2105684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-08 | 1955-04-09 | 1955-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-08 | 1959-04-09 | 1959-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-08 | 1963-04-09 | 1963-10-09 | $7700.00 | Window Closed / Lapsed |