US2601253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions and method of shaping same
Assignee: Industrial Rayon Corp
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Filing: 1949-06-13
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Granted: 1952-06-24
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Expires: 1969-06-13
Abstract
No abstract record available.
Inventors
- 👤 Herman A Bruson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:18
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/091; D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
39 words
A SPINNING SOLUTION USEFUL FOR THE FORMATION OF FILAMENTARY MATERIAL COMPRISING A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE; ETHYLENE CARBONATE; AND A RELATIVELY SMALL AMOUNT OF A WATER-SOLUBLE, HYDROXY-ALIPHATIC MONO-MERCAPTAN.
Claim 2
Dependent Claim
39 words
A SPINNING SOLUTION USEFUL FOR THE FORMATION OF FILAMENTARY MATERIAL COMPRISING A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE; ETHYLENE CARBONATE; AND A RELATIVELY SMALL AMOUNT OF A WATER-SOLUBLE, HYDROXY-ALIPHATIC MONO-MERCAPTAN.
Claim 3
Independent Claim
105 words
A METHOD OF FORMING FILAMENTARY MATERIAL WHICH COMPRISES PREPARING A SPINNING SOLUTION COMPRISING (1) A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE, (2) ETHYLENE CARBONATE, AND (3) BETWEEN ABOUT 0.02% AND 3.0% 2-HYDROXY ETHYL MERCAPTAN; HEATING SAID SPINNING SOLUTION AND MAINTAINING IT AT AN ELEVATED TEMPERATURE; EXTRUDING SAID HEATED SPINNING SOLUTION THROUGH A SPINNERET INTO A LIQUID COAGULATING MEDIUM MAINTAINED AT AN ELEVATED TEMPERATURE; REMOVING THE RESULTING COAGULATED FILAMENTARY MATERIAL FROM SAID COAGULATING MEDIUM; WASHING SAID FILAMENTARY MATERIAL BY STRETCHING AND THEREAFTER HEATING SAID ORIENTED MATERIAL TO AN ELEVATED TEMPERATURE WHILE IT IS IN A RELAXED CONDITION.
Claim 4
Independent Claim
105 words
A METHOD OF FORMING FILAMENTARY MATERIAL WHICH COMPRISES PREPARING A SPINNING SOLUTION COMPRISING (1) A POLYMER OF ACRYLONITRILE CONTAINING IN THE POLYMER MOLECULE AT LEAST 80% BY WEIGHT OF ACRYLONITRILE, (2) ETHYLENE CARBONATE, AND (3) BETWEEN ABOUT 0.02% AND 3.0% 2-HYDROXY ETHYL MERCAPTAN; HEATING SAID SPINNING SOLUTION AND MAINTAINING IT AT AN ELEVATED TEMPERATURE; EXTRUDING SAID HEATED SPINNING SOLUTION THROUGH A SPINNERET INTO A LIQUID COAGULATING MEDIUM MAINTAINED AT AN ELEVATED TEMPERATURE; REMOVING THE RESULTING COAGULATED FILAMENTARY MATERIAL FROM SAID COAGULATING MEDIUM; WASHING SAID FILAMENTARY MATERIAL BY STRETCHING AND THEREAFTER HEATING SAID ORIENTED MATERIAL TO AN ELEVATED TEMPERATURE WHILE IT IS IN A RELAXED CONDITION.
References Cited (Backward Citations)
US2404717A
Cited
US2404714A
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CH236024A
Cited
FR896083A
Cited
US2434054A
Cited
US2426719A
Cited
US2456360A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-06-24 | 1955-12-24 | 1956-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-06-24 | 1959-12-24 | 1960-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-06-24 | 1963-12-24 | 1964-06-24 | $7700.00 | Window Closed / Lapsed |