US3639375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alpha-olefin polymers
Assignee: BASF SE
•
Filing: 1968-01-29
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Granted: 1972-02-01
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Expires: 1988-01-29
Abstract
Abstract POLYMERIZATION OF A -OLEFINS HAVING TWO TO EIGHT CARBON ATOMS IN THE PRESENCE OF A CATALYST CONSISTING OF A COMPLEX COMPOUND OF A TITANIUM (III) HALIDE AND AN ALUMINUM HALIDE AND AN ORGANOALUMINUM COMPOUND AND, OPTIONALLY, AN ORGANOZINC COMPOUND, PLUS A SECONDARY OR TERTIARY AMINE AND ALSO AN ORGANIC PHOSPHORUS COMPOUND OF THE FORMULA BELOW, SAID CATALYST BEING PRODUCED BY GRINDING AT LEAST SAID COMPLEX COMPOUND WITH ONE OR BOTH OF SAID AMINE AND SAID PHOSPHORUS COMPOUND.
Inventors
- 👤 Gerhard Staiger
- 👤 Joachim Stedefeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:40
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |