Patent US3313758A successfully refreshed from Google Patents.
US3313758A
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Acrylonitrile polymer spinning compositions
Assignee: Monsanto Co
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Filing: 1966-01-05
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Granted: 1967-04-11
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Expires: 1986-01-05
Abstract
No abstract record available.
Inventors
- 👤 Charles H Apperson
- 👤 James R Misenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:24
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08L; C08L33/00; C08L33/18; C08L33/20; C08J2333/00; C08J2333/18; C08J2333/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A PROCESS FOR PREPARING COMPOSITIONS WHICH CAN BE READILY PREPARED FOR SPINNING FROM ACRYLONITRILE POLYMERS CONTAINING AT LEAST 80 PERCENT BY WEIGHT ACRYLONITRILE AND PREPARED BY AQUEOUS MEDIUM POLYMERIZATION, WHICH COMPRISES DEWATERING THE AQUEOUS ACRYLONITRILE POLYMER SLURRY TO FORM A WET POLYMER FILTER CAKE, WASHING SAID FILTER CAKE WITH AN ORGANIC NON-SOLVENT FOR SAID ACRYLONITRILE POLYMER TO PROVIDE A MIXTURE HAVING A WATER CONTENT OF LESS THAN ABOUT 20 PERCENT BY WEIGHT, THEN WASHING SAID MIXTURE WITH AN ORGANIC SOLVENT FOR SAID ACRYLONITRILE POLYMER TO PROVIDE A MIXTURE HAVING A NON-SOLVENT CONTENT OF LESS THAN ABOUT 15 PERCENT BY WEIGHT AND A WATER CONTENT OF LESS THAN ABOUT 10 PERCENT BY WEIGHT, SAID WASHING BEING CONDUCTED AT A TEMPERATURE OF LESS THAN ABOUT 30*C.
Claim 2
Dependent Claim
124 words
A PROCESS FOR PREPARING COMPOSITIONS WHICH CAN BE READILY PREPARED FOR SPINNING FROM ACRYLONITRILE POLYMERS CONTAINING AT LEAST 80 PERCENT BY WEIGHT ACRYLONITRILE AND PREPARED BY AQUEOUS MEDIUM POLYMERIZATION, WHICH COMPRISES DEWATERING THE AQUEOUS ACRYLONITRILE POLYMER SLURRY TO FORM A WET POLYMER FILTER CAKE, WASHING SAID FILTER CAKE WITH AN ORGANIC NON-SOLVENT FOR SAID ACRYLONITRILE POLYMER TO PROVIDE A MIXTURE HAVING A WATER CONTENT OF LESS THAN ABOUT 20 PERCENT BY WEIGHT, THEN WASHING SAID MIXTURE WITH AN ORGANIC SOLVENT FOR SAID ACRYLONITRILE POLYMER TO PROVIDE A MIXTURE HAVING A NON-SOLVENT CONTENT OF LESS THAN ABOUT 15 PERCENT BY WEIGHT AND A WATER CONTENT OF LESS THAN ABOUT 10 PERCENT BY WEIGHT, SAID WASHING BEING CONDUCTED AT A TEMPERATURE OF LESS THAN ABOUT 30*C.
References Cited (Backward Citations)
US2496267A
Cited
US2637717A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |