US3830787A
Expired / Lapsed
US
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Catalysts for the polymerization of olefins
Assignee: Montedison SpA
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Filing: 1972-04-05
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Granted: 1974-08-20
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Expires: 1992-04-05
Abstract
Abstract NEW CATALYSTS FOR THE POLYMERIZATION OF OLEFINS, MORE PARTICULARLY FOR THE POLYMERIZATION OF ETHYLENE AND MIXTURES THEREOF WITH HIGHER ALPHA-OLEFINS ARE DISCLOSED, AS WELL AS METHODS FOR PREPARING THE SAME, AND FOR POLYMERIZING OLEFINS THEREWITH. THE NEW CATALYSTS ARE PREPARED BY MIXING A HYDRIDE OR ORGANOMETALLIC COMPOUND OF A METAL BELONGING TO GROUP I, II OR III OF THE MENDELYEEV PERIODIC TABLE WITH THE PRODUCT OBTAINED BY CONTACTING A TITANIUM COMPOUND WITH THE SOLID REACTION PRODUCT OF A HYDRATED MAGNESIUM HALIDE AND AN ORGANOMETALLIC COMPOUND OF ONE OF SAID GROUPS I TO III METALS, IN A MOLAR RATIO ORGANOMETALLIC COMPOUND/H2O OF AT LEAST 1.
Inventors
- 👤 R Emilia
- 👤 A Mayr
- 👤 E Susa
- 👤 V Davoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:55
CPC Classifications
C; C08; C08F; C08F10/00; C08F4/00; C08F4/02; C08F4/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |