US2777751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spinning aqueous-saline solutions of acrylonitrile polymers
Assignee: Wyeth Holdings LLC
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Filing: 1951-03-08
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Granted: 1957-01-15
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Expires: 1971-03-08
Abstract
No abstract record available.
Inventors
- 👤 Cresswell Arthur
- 👤 Jr Percival W Cummings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:16
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF FORMING SHAPED STRUCTURES FROM AN ACRYLONITRILE POLYMERIZATION PRODUCT WHICH COMPRISES EXTRUDING AN AQUEOUS SOLUTION OF AN ACRYLONITRILE POLYMERIZATION PRODUCT CONTAINING A MAJOR PROPORTION BY WEIGHT OF COMBINED ACRYLONITRILE THROUGH A SHAPED ORIFICE INTO A LIQUID COAGULATING BATH COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 3% TO ABOUT 25%, BY WEIGHT, OF A WATER-SOLUBLE THIOCYANATE WHICH YEILDS HIGHLY HYDRATED IONS IN AN AQUEOUS SOLUTION, SAID COAGULATING BATH BEING AT A TEMPERTURE NOT EXCEEDING +10*C. AND SAID ACRYLONITRILE POLYMERIZATION PRODUCT BEING DISSOLVED IN A CONCENTRATED AQUEOUS SOLUTION OF THE SAME WATER-SOLUBLE THIOCYANATE WHICH IS A COMPONENT OF THE SAID LIQUID COAGULATING BATH.
Claim 2
Independent Claim
103 words
A METHOD OF FORMING SHAPED STRUCTURES FROM AN ACRYLONITRILE POLYMERIZATION PRODUCT WHICH COMPRISES EXTRUDING AN AQUEOUS SOLUTION OF AN ACRYLONITRILE POLYMERIZATION PRODUCT CONTAINING A MAJOR PROPORTION BY WEIGHT OF COMBINED ACRYLONITRILE THROUGH A SHAPED ORIFICE INTO A LIQUID COAGULATING BATH COMPRISING AN AQUEOUS SOLUTION CONTAINING FROM ABOUT 3% TO ABOUT 25%, BY WEIGHT, OF A WATER-SOLUBLE THIOCYANATE WHICH YEILDS HIGHLY HYDRATED IONS IN AN AQUEOUS SOLUTION, SAID COAGULATING BATH BEING AT A TEMPERTURE NOT EXCEEDING +10*C. AND SAID ACRYLONITRILE POLYMERIZATION PRODUCT BEING DISSOLVED IN A CONCENTRATED AQUEOUS SOLUTION OF THE SAME WATER-SOLUBLE THIOCYANATE WHICH IS A COMPONENT OF THE SAID LIQUID COAGULATING BATH.
References Cited (Backward Citations)
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Cited
US2004271A
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US2025730A
Cited
US2140921A
Cited
US2420565A
Cited
US2558731A
Cited
US2558730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |