Patent US2829133A successfully refreshed from Google Patents.
US2829133A
Expired / Lapsed
US
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Process for polymerizing vinyl chloride in aqueous dispersion
Assignee: Solvic SA
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Filing: 1954-03-26
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Granted: 1958-04-01
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Expires: 1974-03-26
Abstract
No abstract record available.
Inventors
- 👤 Coene Robert De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:36
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR POLYMERIZATION VINYL CHLORIDE IN AQUEOUS DISPERSION, WHICH COMPRISES INTRODUCING MONOMERIC VINYL CHLORIDE IN GASEOUS FORM INTO A POLYMERIZATION ZONE WITH AGITATION IN THE PRESENCE OF A PROTECTIVE COLLOID AND IN THE PRESENCE OF A POLYMERIZATION CATALYST SOLUBLE IN SAID MONOMERIC VINYL CHLORIDE AND EFFECTIVE TO POLYMERIZE THE VINYL CHLORIDE, SAID MONOMERIC VINYL CHLORIDE BEING INTRODUCED CONTINUOUSLY INTO SAID POLYMERIZATION ZONE AT A RATE SUCH THAT THE PRESSURE IN THE ZONE WILL BE AS HIGH AS POSSIBLE BUT LOWER THAN THE SATURATION PRESSURE OF SAID MONOMERIC VINYL CHLORIDE AT THE POLYMERIZATION TEMPERATURE, WHEREBY SAID MONOMERIC VINYL CHLORIDE REMAINS IN GASEOUS FORM AT ALL TIMES AND A GRANULAR POLYMER IS FORMED INTERRUPTING INTRODUCTION OF SAID MONOMERIC VINYL CHLORIDE, AND REMOVING THE POLYMER FROM SAID ZONE.
Claim 2
Dependent Claim
126 words
A PROCESS FOR POLYMERIZATION VINYL CHLORIDE IN AQUEOUS DISPERSION, WHICH COMPRISES INTRODUCING MONOMERIC VINYL CHLORIDE IN GASEOUS FORM INTO A POLYMERIZATION ZONE WITH AGITATION IN THE PRESENCE OF A PROTECTIVE COLLOID AND IN THE PRESENCE OF A POLYMERIZATION CATALYST SOLUBLE IN SAID MONOMERIC VINYL CHLORIDE AND EFFECTIVE TO POLYMERIZE THE VINYL CHLORIDE, SAID MONOMERIC VINYL CHLORIDE BEING INTRODUCED CONTINUOUSLY INTO SAID POLYMERIZATION ZONE AT A RATE SUCH THAT THE PRESSURE IN THE ZONE WILL BE AS HIGH AS POSSIBLE BUT LOWER THAN THE SATURATION PRESSURE OF SAID MONOMERIC VINYL CHLORIDE AT THE POLYMERIZATION TEMPERATURE, WHEREBY SAID MONOMERIC VINYL CHLORIDE REMAINS IN GASEOUS FORM AT ALL TIMES AND A GRANULAR POLYMER IS FORMED INTERRUPTING INTRODUCTION OF SAID MONOMERIC VINYL CHLORIDE, AND REMOVING THE POLYMER FROM SAID ZONE.
References Cited (Backward Citations)
US2511593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-31 | 1961-09-30 | 1962-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-31 | 1965-09-30 | 1966-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-31 | 1969-09-30 | 1970-04-01 | $7700.00 | Window Closed / Lapsed |