Patent US3200102A successfully refreshed from Google Patents.
US3200102A
Expired / Lapsed
US
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Process for the production of hydrolyzed acrylonitrile polymers
Assignee: Bayer AG
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Filing: 1962-08-14
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Granted: 1965-08-10
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Expires: 1982-08-14
Abstract
No abstract record available.
Inventors
- 👤 Kleiner Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/50; B; B60; B60G; B60G17/00; B60G17/02; B60G17/04; B60G17/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF A HYDROLYZED POLYMER OF ACRYLONITRILE WHICH COMPRISES HEATING TO A TEMPERATURE OF ABOUT 180-230*C. OVER A PERIOD OF 4 TO 6 HOURS A POLYMER OF ACRYLONITRILE WHICH CONTAINS AT LEAST 60% BY WEIGHT OF POLYMERIZED ACRYLONITRILE, SAID POLYMER OF ACRYLONITRILE BEING DISPERSED IN WATER IN A RATIO OF WATER TO POLYMER OF BETWEEN 10:1 AND AND 1:1, AND RECOVERING A HYDROLYZED POLYMER OF ACRYLONITRILE CONTAINING CARBONAMIDE GROUPS AND CARBOXYLIC ACID GROUPS IN THE FORM OF THEIR AMMONIUM SALTS IN A RATIO OF ABOUT 1:1.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PRODUCTION OF A HYDROLYZED POLYMER OF ACRYLONITRILE WHICH COMPRISES HEATING TO A TEMPERATURE OF ABOUT 180-230*C. OVER A PERIOD OF 4 TO 6 HOURS A POLYMER OF ACRYLONITRILE WHICH CONTAINS AT LEAST 60% BY WEIGHT OF POLYMERIZED ACRYLONITRILE, SAID POLYMER OF ACRYLONITRILE BEING DISPERSED IN WATER IN A RATIO OF WATER TO POLYMER OF BETWEEN 10:1 AND AND 1:1, AND RECOVERING A HYDROLYZED POLYMER OF ACRYLONITRILE CONTAINING CARBONAMIDE GROUPS AND CARBOXYLIC ACID GROUPS IN THE FORM OF THEIR AMMONIUM SALTS IN A RATIO OF ABOUT 1:1.
References Cited (Backward Citations)
US2982760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |