US2649435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of acrylonitrile in presence of formylated polyvinyl alcohol
Assignee: Eastman Kodak Co
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Filing: 1951-12-05
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Granted: 1953-08-18
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Expires: 1971-12-05
Abstract
No abstract record available.
Inventors
- 👤 Theodore E Stanin
- 👤 Joseph B Dickey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:47
CPC Classifications
C; C08; C08F; C08F261/00; C08F261/02; C08F261/04; Y; Y10; Y10S; Y10S8/00; Y10S8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PREPARING A COMPOSITE POLYMER OF ACRYLONITRILE AND A POLYVINYL RESIN COMPRISING HEATING IN THE PRESENCE OF A PERIOXIDE POLYMERIZATION CATALYST A MIXTURE COMPRISING FROM 60 TO 90 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 40 TO 10 PER CENT BY WEIGHT OF FORMYLATED POLYVINYL ALCOHOL, SAID FORMYLATED POLYVINYL ALCOHOL CONTAINING FROM 10 TO 40.27 PER CENT BY WEIGHT OF FORMYL.
Claim 2
Dependent Claim
64 words
A PROCESS FOR PREPARING A COMPOSITE POLYMER OF ACRYLONITRILE AND A POLYVINYL RESIN COMPRISING HEATING IN THE PRESENCE OF A PERIOXIDE POLYMERIZATION CATALYST A MIXTURE COMPRISING FROM 60 TO 90 PER CENT BY WEIGHT OF ACRYLONITRILE AND FROM 40 TO 10 PER CENT BY WEIGHT OF FORMYLATED POLYVINYL ALCOHOL, SAID FORMYLATED POLYVINYL ALCOHOL CONTAINING FROM 10 TO 40.27 PER CENT BY WEIGHT OF FORMYL.
References Cited (Backward Citations)
US2569470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |