US3597367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordination catalysts for alpha-olefin polymerization
Assignee: EIDP Inc
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Filing: 1968-03-25
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Granted: 1971-08-03
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Expires: 1988-03-25
Abstract
Abstract A CATALYST SYSTEM PARTICULARLY USEFUL IN ALPHA-OLEFIN COPOLYMERIZATION IS PREPARED BY THE ADMIXTURE OF AN ETHER COMPLEX OF ALUMINUM BOROHYDRIDE; SELECTED ORGANIC-SOLUBLE HALOVANADIUM COMPOUNDS SUCH AS VANADIUM OXYTRICHLORIDE; AND A SELECTED LEWIS ACID, SUCH AS ALUMINUM TRIBROMIDE OR ALUMINUM TRICHLORIDE. SOLUBILITY OF THE ALUMINUM TRICHLORIDE CAN BE ENHANCED BY PRETREATMENT WITH AN ALKYL HALIDE, SUCH AS I-IODOETHANE. THE CATALYST MAY BE FORMED SEPARATELY OR IN SITU IN THE POLYMERIZATION REACTION MIXTURE.
Inventors
- 👤 David Apotheker
- 👤 Arthur L Barney
- 👤 Nicolas Brodoway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:37
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |