US2779746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of spinning solutions of polyacrylonitrile or mixed polymers thereof
Assignee: Glanzstoff AG
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Filing: 1952-11-14
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Granted: 1957-01-29
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Expires: 1972-11-14
Abstract
No abstract record available.
Inventors
- 👤 Heisenberg Erwin
- 👤 Pirot Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:35
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF SPINNING SOLUTIONS OF POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS THEREOF CONTAINING AT LEAST 85 PERCENT BY WEIGHT OF COMBINED ACRYLONITRILE AND ANOTHER COMPONENT SELECTED FROM THE GROUP CONSISTING OF COMBINED ACRYLIC ACID AMIDE MALEIC ACID AMIDE, FUMARIC ACID AMIDE, ACRYLIC ACID DIAMIDE, MALEIC ACID DIAMIDE, FUMARIC ACID AMIDE DIAMIDE, METHACRYLIC ACID METHYL ESTER, STYRENE, VINYL CHLORIDE, VINYLIDENE CHLORIDE, VINYL ACETAATE, VINYL CARBAZOLE, VINYL IMIDAZOLE VINYL PYRIDINE, WHICH COMPRISES GRADUALLY DISPERSING THE NITRAILE COMMINUTED TO A PARTICLE SIZE RANGING BETWEEN ABOUT 10 AND 100U AT A TEMPERATURE RANGING BETWEEN ABOUT 0* AND 30*C. AT THE RATE OF ABOUT ONE GRAM PER SECOND IN A COLD SOLVENT KEPT UNDER VACUUM, STIRRING THE MIXTURE 3 TO 10 HOURS UNDER CONTINUOUS COOLING, FREEING TURE RANGING FROM 60* TO 150*C. AND THEN SPINNING BY THE CONTINUOUS METHOD.
Claim 2
Independent Claim
139 words
THE METHOD OF SPINNING SOLUTIONS OF POLYMERS SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND COPOLYMERS THEREOF CONTAINING AT LEAST 85 PERCENT BY WEIGHT OF COMBINED ACRYLONITRILE AND ANOTHER COMPONENT SELECTED FROM THE GROUP CONSISTING OF COMBINED ACRYLIC ACID AMIDE MALEIC ACID AMIDE, FUMARIC ACID AMIDE, ACRYLIC ACID DIAMIDE, MALEIC ACID DIAMIDE, FUMARIC ACID AMIDE DIAMIDE, METHACRYLIC ACID METHYL ESTER, STYRENE, VINYL CHLORIDE, VINYLIDENE CHLORIDE, VINYL ACETAATE, VINYL CARBAZOLE, VINYL IMIDAZOLE VINYL PYRIDINE, WHICH COMPRISES GRADUALLY DISPERSING THE NITRAILE COMMINUTED TO A PARTICLE SIZE RANGING BETWEEN ABOUT 10 AND 100U AT A TEMPERATURE RANGING BETWEEN ABOUT 0* AND 30*C. AT THE RATE OF ABOUT ONE GRAM PER SECOND IN A COLD SOLVENT KEPT UNDER VACUUM, STIRRING THE MIXTURE 3 TO 10 HOURS UNDER CONTINUOUS COOLING, FREEING TURE RANGING FROM 60* TO 150*C. AND THEN SPINNING BY THE CONTINUOUS METHOD.
References Cited (Backward Citations)
US2404713A
Cited
US2573949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |