US3330898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing highly shrinkable acrylonitrile polymer fibers
Assignee: Dow Chemical Co
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Filing: 1963-08-07
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Granted: 1967-07-11
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Expires: 1983-08-07
Abstract
No abstract record available.
Inventors
- 👤 Rupert B Hurley
- 👤 James H Hood
- 👤 James R Tyeryar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:01
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/28; D01F6/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD FOR PREPARING HIGHLY SHRINKABLE ACRYLONITRILE POLYMER FIBERS COMPRISING (A) SPINNING A SOLUTION OF POLYMER OF AN ETHYLENICALLY UNSATURATED MONOMERIC MATERIAL CONTAINING AT LEAST ABOUT 80 WEIGHT PERCENT ACRYLONITRILE INTO AN AQUEOUS COAGULATING BATH; (B) STRETCHING THE COAGULATED FILAMENT TO ORIENT THE MOLECULES THEREOF IN AN INERT AQUEOUS MEDIUM AT BETWEEN ABOUT 90* AND 110*C. AT A STRETCH RATE OF BETWEEN ABOUT 0.1 AND 0.75 FEET PER SECOND 2; AND, (C) SUBSEQUENTLY, IRREVERSIBLY DRYING THE STRETCHED FILAMENTS IN A RELAXED CONDITION AT BETWEEN ABOUT 60* AND 90*C.
Claim 2
Independent Claim
88 words
A METHOD FOR PREPARING HIGHLY SHRINKABLE ACRYLONITRILE POLYMER FIBERS COMPRISING (A) SPINNING A SOLUTION OF POLYMER OF AN ETHYLENICALLY UNSATURATED MONOMERIC MATERIAL CONTAINING AT LEAST ABOUT 80 WEIGHT PERCENT ACRYLONITRILE INTO AN AQUEOUS COAGULATING BATH; (B) STRETCHING THE COAGULATED FILAMENT TO ORIENT THE MOLECULES THEREOF IN AN INERT AQUEOUS MEDIUM AT BETWEEN ABOUT 90* AND 110*C. AT A STRETCH RATE OF BETWEEN ABOUT 0.1 AND 0.75 FEET PER SECOND 2; AND, (C) SUBSEQUENTLY, IRREVERSIBLY DRYING THE STRETCHED FILAMENTS IN A RELAXED CONDITION AT BETWEEN ABOUT 60* AND 90*C.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |