Patent US2808311A successfully refreshed from Google Patents.
US2808311A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of setting the crimp in acrylonitrile polymer fibers with chemical shrinking and setting agents
Assignee: EIDP Inc
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Filing: 1954-10-15
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Granted: 1957-10-01
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Expires: 1974-10-15
Abstract
No abstract record available.
Inventors
- 👤 Hare Weston Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:45
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/335; D06M13/10; D06M13/152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS OF TREATING MECHANICALLY CRIMPED FIBROUS MATERIAL COMPOSED OF ACRYLONITRILE POLYMER OF AT LEAST ABOUT 85% BY WEIGHT OF ACRYLONITRILE AND UP TO ABOUT 15% BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED WITH THE SAID ACRYLONITRILE, SAID FIBROUS MATERIAL BEING CAPABLE XXXX SHRUNK AND THE CRIMP BEING SET, WHICH COMPRISES IMPREGNATING THE SAID CRIMPED FIBROUS MATERIAL WITH AN AQUEOUS SOLUTION HEATED TO A TEMPERATURE BETWEEN ABOUT 95*C. AND ITS BOILING POINT UNDER ATMOSPHERIC PRESSURE FOR A TIME UP TO ABOUT 20 MINUTES UNTIL THE FIBROUS MATERIAL IS SHRUNK AND THE CRIMP SET, SAID AQUEOUS SOLUTION CONTAINING FROM ABOUT 0.5% TO ABOUT 40% OF AN AROMATIC COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
110 words
THE PROCESS OF TREATING MECHANICALLY CRIMPED FIBROUS MATERIAL COMPOSED OF ACRYLONITRILE POLYMER OF AT LEAST ABOUT 85% BY WEIGHT OF ACRYLONITRILE AND UP TO ABOUT 15% BY WEIGHT OF MONOETHYLENICALLY UNSATURATED MONOMER COPOLYMERIZED WITH THE SAID ACRYLONITRILE, SAID FIBROUS MATERIAL BEING CAPABLE XXXX SHRUNK AND THE CRIMP BEING SET, WHICH COMPRISES IMPREGNATING THE SAID CRIMPED FIBROUS MATERIAL WITH AN AQUEOUS SOLUTION HEATED TO A TEMPERATURE BETWEEN ABOUT 95*C. AND ITS BOILING POINT UNDER ATMOSPHERIC PRESSURE FOR A TIME UP TO ABOUT 20 MINUTES UNTIL THE FIBROUS MATERIAL IS SHRUNK AND THE CRIMP SET, SAID AQUEOUS SOLUTION CONTAINING FROM ABOUT 0.5% TO ABOUT 40% OF AN AROMATIC COMPOUND HAVING THE FORMULA:
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |