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US2918447A
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Preparation of dry solutions of acrylonitrile vinylpyridine copolymers
Assignee: Solutia Inc
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Filing: 1955-10-19
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Granted: 1959-12-22
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Expires: 1975-10-19
Abstract
No abstract record available.
Inventors
- 👤 George E Ham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:29
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08L; C08L33/00; C08L33/18; C08L33/20; D; D01; D01F; D01F6/00; D01F6/28; D01F6/38; C08J2333/00; C08J2333/18; C08J2333/20; C08J2357/00; C08J2357/06; C08J2357/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
45 words
THE METHOD OF PREPARING SUBSTANTIALLY ANHYDROUS ORGANIC SOLVENT SOLUTIONS OF ACYLONITRILE-VINLPYRIDINE COPOLYMERS FROM AQUEOUS EMULSIONS OF SUCH COPOLYMERS, WHICH COMPRISES MIXING WITH AGITATION SAID AQUEOUS EMULSION WITH A WATER MISCIBLE ORGANIC SOLVENT FOR ACRYLONITRILE-VINYLPYRIDINE COPOLYMERS AND DISTILLING OFF SUBSTANTIALLY ALL THE WATER FROM THE MIXTURE.
Claim 2
Independent Claim
45 words
THE METHOD OF PREPARING SUBSTANTIALLY ANHYDROUS ORGANIC SOLVENT SOLUTIONS OF ACYLONITRILE-VINLPYRIDINE COPOLYMERS FROM AQUEOUS EMULSIONS OF SUCH COPOLYMERS, WHICH COMPRISES MIXING WITH AGITATION SAID AQUEOUS EMULSION WITH A WATER MISCIBLE ORGANIC SOLVENT FOR ACRYLONITRILE-VINYLPYRIDINE COPOLYMERS AND DISTILLING OFF SUBSTANTIALLY ALL THE WATER FROM THE MIXTURE.
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |