US3630976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of vinyl chloride
Assignee: Solvay SA
•
Filing: 1969-05-02
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Granted: 1971-12-28
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Expires: 1989-05-02
Abstract
Abstract VINYL CHLORIDE IS POLYMERIZED IN AQUEOUS SUSPENSION IN A ONE STEP OPERATION BY INTRODUCING INTO AN AQUEOUS MEDUIM VINYL CHLORIDE, A POLYMERIZATION CATALYST AND A SUSPENSION-FORMING AGENT COMPRISED OF POLYVINYL ALCOHOL AND ONE OR MORE PRODUCTS DERIVED FROM THE CONDENSATION OF A POLYOXYALKYLENE GLYCOL AND A MONOMERIC POLYAMINE. THE POLYVINYL CHLORIDE PRODUCT IS OBTAINED IN THE FORM OF HIGHLY POROUS GRANULES.
Inventors
- 👤 Alexis Mathieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:35
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; Y; Y10; Y10S; Y10S526/00; Y10S526/91
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |