Patent US2945836A successfully refreshed from Google Patents.
US2945836A
Expired / Lapsed
US
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Process of polymerizing monomeric styrene in the presence of a copolymer of ethylene and vinylene carbonate
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-12-11
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Granted: 1960-07-19
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Expires: 1973-12-11
Abstract
No abstract record available.
Inventors
- 👤 Ival O Salyer
- 👤 James A Herbig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:15
CPC Classifications
C; C08; C08F; C08F255/00; C08F255/02; C08F277/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS WHICH COMPRISES INTIMATELY DISPERSING FROM 1 TO 10 PARTS BY WEIGHT OF A SOLID ETHYLENE/VINYLENE CARBONATE COPOLYMER CONTAINING FROM 1 TO 30 WEIGHT PERCENT OF COMBINED VINYLENE CARBONATE IN SAID COPOLYMER, IN FROM 99 TO 90 PARTS BY WEIGHT LIQUID MONOMERIC STYRENE, AND HEATING TO POLYMERIZE THE RESULTING MATERIAL IN THE PRESENT OF AN ADDED FREE-RADICAL POLYMERIZATION CATALYST TO FORM A HIGH IMPACT STRENGTH COMPOSITION HAVING A MOLECULAR WEIGHT OF AT LEAST 100,000 AND AN ALCOHOL SOLUBLE CONTENT OF LESS THAN 5 PERCENT.
Claim 2
Dependent Claim
85 words
A PROCESS WHICH COMPRISES INTIMATELY DISPERSING FROM 1 TO 10 PARTS BY WEIGHT OF A SOLID ETHYLENE/VINYLENE CARBONATE COPOLYMER CONTAINING FROM 1 TO 30 WEIGHT PERCENT OF COMBINED VINYLENE CARBONATE IN SAID COPOLYMER, IN FROM 99 TO 90 PARTS BY WEIGHT LIQUID MONOMERIC STYRENE, AND HEATING TO POLYMERIZE THE RESULTING MATERIAL IN THE PRESENT OF AN ADDED FREE-RADICAL POLYMERIZATION CATALYST TO FORM A HIGH IMPACT STRENGTH COMPOSITION HAVING A MOLECULAR WEIGHT OF AT LEAST 100,000 AND AN ALCOHOL SOLUBLE CONTENT OF LESS THAN 5 PERCENT.
References Cited (Backward Citations)
US2282002A
Cited
US2563771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |