Patent US2640049A successfully refreshed from Google Patents.
US2640049A
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Preparation of acrylonitrilevinylpyridine polymers
Assignee: EIDP Inc
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Filing: 1948-03-02
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Granted: 1953-05-26
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Expires: 1968-03-02
Abstract
No abstract record available.
Inventors
- 👤 Rothrock George Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:40
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/42; C08F20/08; C08F220/00; C08F220/02; C08F220/42; C08F220/44; Y; Y10; Y10S; Y10S526/00; Y10S526/915
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A PROCESS FOR CONTINUOUSLY POLYMERIZING MONOMERS COMPRISING ACRYLONITRILE AND A VINYLPYRIDINE TO POLYMERS OF A CONTROLLED MOLECULAR WEIGHT WHICH PROCESS COMPRISES CONTINUOUSLY DISSOLVING ACRYLONITRILE AND FROM 2% TO 8% OF SAID VINYL PYRIDINE, BASED ON THE TOTAL AMOUNT OF SAID MONOMERS, IN AN AQUEOUS SOLUTION CONTAINING A POLYMERIZATION CATALYST AND HAVING A PH NOT EXCEEDING 6 UPON WHICH SAID MOLECULAR WEIGHT IS DEPENDENT AND POLYMERIZING SAID MONOMERS IN SAID SOLUTION WHILE CONTINUOUSLY ADDING ACID TO SAID SOLUTION TO MAINTAIN SAID PH SUBSTANTIALLY CONSTANT.
Claim 2
Dependent Claim
83 words
A PROCESS FOR CONTINUOUSLY POLYMERIZING MONOMERS COMPRISING ACRYLONITRILE AND A VINYLPYRIDINE TO POLYMERS OF A CONTROLLED MOLECULAR WEIGHT WHICH PROCESS COMPRISES CONTINUOUSLY DISSOLVING ACRYLONITRILE AND FROM 2% TO 8% OF SAID VINYL PYRIDINE, BASED ON THE TOTAL AMOUNT OF SAID MONOMERS, IN AN AQUEOUS SOLUTION CONTAINING A POLYMERIZATION CATALYST AND HAVING A PH NOT EXCEEDING 6 UPON WHICH SAID MOLECULAR WEIGHT IS DEPENDENT AND POLYMERIZING SAID MONOMERS IN SAID SOLUTION WHILE CONTINUOUSLY ADDING ACID TO SAID SOLUTION TO MAINTAIN SAID PH SUBSTANTIALLY CONSTANT.
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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |