Patent DE291314C successfully refreshed from Google Patents.
Patent US3296171A successfully refreshed from Google Patents.
US3296171A
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US
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Heat stable acrylonitrile polymer compositions and means for manufacture thereof
Assignee: Dow Chemical Co
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Filing: 1963-08-23
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Granted: 1967-01-03
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Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 John H Hennes
- 👤 Charles R Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:38
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/44; C08F2/00; C08F2/12; C08F2/16; C08K; C08K3/00; C08K3/10; C08K3/11
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
82 words
METHOD FOR PREPARING A SOLUTION OF AN ACRYLONITRILE POLYMER FROM WHICH SHAPED ARTICLES CAN BE MANUFACTURED HAVING IMPROVED INITIAL WHITNESS AND HEAT STABILITY COMPRISING POLYMERIZING AN ETHYLENICALLY UNSATURATED MONOMERIC MATERIAL CONTAINING AT LEAST ABOUT 80 WEIGHT PERCENT ACRYLONITRILE DISSOLVED IN AN AQUEOUS SALINE SOLUTION THAT IS A SOLVENT FOR SAID MONOMERIC MATERIAL AND POLYMERS THEREFROM, SAID SOLUTION HAVING INCORPORATED THEREIN BETWEEN ABOUT 0.1 TO ABOUT 5 WEIGHT PERCENT, BASED ON THE WEIGHT OF SAID MONOMERIC MATERIAL, OF A WATER SOLUBLE ZIRCONIUM SALT.
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) | 1970-01-02 | 1970-07-04 | 1971-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-02 | 1974-07-04 | 1975-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-02 | 1978-07-04 | 1979-01-03 | $7700.00 | Window Closed / Lapsed |