US2647107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iodoform as modifier in vinyl chloride polymerization
Assignee: Imperial Chemical Industries Ltd
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Filing: 1950-04-03
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Granted: 1953-07-28
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Expires: 1970-04-03
Abstract
No abstract record available.
Inventors
- 👤 Barnes Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:25
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F2438/00; C08F2438/01; Y; Y10; Y10S; Y10S526/00; Y10S526/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A PROCESS FOR THE POLYMERIZATION OF VINYL CHLORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PEROXY POLYMERIZATION CATALYST, ORGANIC AZO POLYMERIZATION CATALYSTS AND INORGANIC PERSULFATE POLYMERIZATION CATALYSTS TO FORM POLYMERS OF VINYL CHLORIDE OF RELATIVELY LOW AVERAGE MOLECULAR WEIGHT, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF IODOFORM IN AN AMOUNT NOT MORE THAN 1.0% BY WEIGHT OF THE POLYMERIZABLE MATERIAL.
Claim 2
Dependent Claim
71 words
IN A PROCESS FOR THE POLYMERIZATION OF VINYL CHLORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF PEROXY POLYMERIZATION CATALYST, ORGANIC AZO POLYMERIZATION CATALYSTS AND INORGANIC PERSULFATE POLYMERIZATION CATALYSTS TO FORM POLYMERS OF VINYL CHLORIDE OF RELATIVELY LOW AVERAGE MOLECULAR WEIGHT, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF IODOFORM IN AN AMOUNT NOT MORE THAN 1.0% BY WEIGHT OF THE POLYMERIZABLE MATERIAL.
References Cited (Backward Citations)
US2463225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |