Patent US2963457A successfully refreshed from Google Patents.
US2963457A
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US
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Polymerization of acrylonitrile in aqueous solution containing a perchlorate salt
Assignee: Wyeth Holdings LLC
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Filing: 1956-08-22
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Granted: 1960-12-06
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 Mary L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:56
CPC Classifications
C; C08; C08F; C08F291/00; C08F2/00; C08F2/12; C08F2/16; C08F20/00; C08F20/02; C08F20/42; C08F20/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
THE PROCESS OF PREPARING A SOLUTION OF POLYMER AN AQUEOUS MEDIUM WHICH COMPRISES POLYMERIZING A MONOMERIC POLYMERIZABLE MATERIAL, SELECTED FROM THE CLASS CONSISTING OF ACRYLONITRILE AND MIXTURES CONTAINING AT LEAST 25% ACRYLONITRILE, THE REMAINDER OF THE SAID MICTURE BEING SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE, METHACRYLAMIDE, ACRYLIC ACID, METHACRYLIC ACID, METHACRYLONITRILE, ETHYL ACRYLATE AND ETHYL METHACRYLATE, IN AN AQUEOUS SOLUTION CONTAINING A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL PERCHLORATE SALTS, IN A SALT WATER WEIGHT RATIO OF FROM 1:1 4:1 AND A PEROXIDIC CATALYST.
Claim 2
Dependent Claim
92 words
THE PROCESS OF PREPARING A SOLUTION OF POLYMER AN AQUEOUS MEDIUM WHICH COMPRISES POLYMERIZING A MONOMERIC POLYMERIZABLE MATERIAL, SELECTED FROM THE CLASS CONSISTING OF ACRYLONITRILE AND MIXTURES CONTAINING AT LEAST 25% ACRYLONITRILE, THE REMAINDER OF THE SAID MICTURE BEING SELECTED FROM THE GROUP CONSISTING OF ACRYLAMIDE, METHACRYLAMIDE, ACRYLIC ACID, METHACRYLIC ACID, METHACRYLONITRILE, ETHYL ACRYLATE AND ETHYL METHACRYLATE, IN AN AQUEOUS SOLUTION CONTAINING A SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND ALKALINE EARTH METAL PERCHLORATE SALTS, IN A SALT WATER WEIGHT RATIO OF FROM 1:1 4:1 AND A PEROXIDIC CATALYST.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |