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US3663660A
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US
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Process for the preparation of a catalyst useful for the polymerization of olefins
Assignee: Solvay SA
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Filing: 1969-06-18
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Granted: 1972-05-16
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Expires: 1989-06-18
Abstract
Abstract IMPROVED CATALYSTS FOR THE POLYMERIZATION OF OLEFINS WHICH COMPRISES AN ORGANOMETALLIC COMPOUND AND THE REACTION PRODUCED OF A LIQUID HALOGENATED DERIVATIVE OF A TRANSITION METAL AND A SOLID SUPPORT CONSITUTED BY AN OXIDE OF CALCIUM AND/OR MAGNESIUM ARE PROVIDED. THE SOLID SUPPORTS FOR THE IMPROVED CATALYSTS ARE OBTAINED BY THE HEAT TREATMENT OF AN OPTIONALLY HYDRATED, CARBONATE OR BASIC CARBONATE OF CALCIUM OR MAGNESIUM AT A TEMPERATURE BETWEEN 350 AND 1000*C.
Inventors
- 👤 Andre Delbouille
- 👤 Yves Gobillon
- 👤 Jacques Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:53
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |