US3644318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the polymerization of olefins
Assignee: Hoechst AG
•
Filing: 1969-06-25
•
Granted: 1972-02-22
•
Expires: 1989-06-25
Abstract
Abstract PROCESS FOR HOMO- AND COPOLYMERIZING OLEFINS IN THE PRESENCE OF A MIXED CATALYST COMPRISING, AS COMPONENT A, A REACTION PRODUCT OF MAGNESIUM ALCOHOLATES WITH TETRAVALENT HALOGENATED TITANIUM COMPOUNDS AND, AS COMPONENT B, ORGANO-ALUMINUM COMPOUNDS. ALREADY UNDER A PRESSURE OF LESS THAN 20 ATMOSPHERES THE YIELDS PER CATALYST OBTAINED ARE SO HIGH THAT THE REMAINDERS OF CATALYST NEED NOT BE REMOVED FROM THE POLYMER. OPTIONALLY, PRODUCTS CAN ALSO BE PREPARED WHICH HAVE A VERY NARROW MOLECULAR WEIGHT DISTRIBUTION AND VERY GOOD COLOR AND CORROSION VALUES.
Inventors
- 👤 Bernd Diedrich
- 👤 Karl Diether Keil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:20
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |