US3595848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the stable aqueous monomer dispersion polymerization and mixed polymerization of vinyl chloride
Assignee: Wacker Chemie AG
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Filing: 1968-01-09
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Granted: 1971-07-27
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Expires: 1988-01-09
Abstract
Abstract THIS INVENTION RELATES TO AN IMPROVEMENT IN THE PROCESS FOR THE POLYMERIZATION OF A POLYMERIZATE CONTAINING AT LEAST 80% POLYVINYL CHLORIDE BY STABLE AQUEOUS MONOMER DISPERSION POLYMERIZATION, THE SAID IMPROVEMENT COMPRISING IN THAT AT LEAST DURING PART OF THE POLYMERIZATION A REFLUX CONDENSATION OF THE MONOMER IS EFFECTED. THIS PROCESS RESULTS IN FASTER POLYMERIZATION TIMES WITH BETTER CONTROL OF PARTICLE SIZE OF THE POLYMERIZATE.
Inventors
- 👤 Herbert Reinecke
- 👤 Johann Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:37
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |