US3658723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of catalytically active halides of titanium by reacting titanium tetrahalides with magnesium amalgam
Assignee: Dow Chemical Co
•
Filing: 1970-02-20
•
Granted: 1972-04-25
•
Expires: 1990-02-20
Abstract
Abstract TITANIUM TETRAHALIDE IS CONTACTED WITH A MIXTURE OF MAGNESIUM POWDER AND MERCURY, SO-CALLED MAGNESIUM AMALGAM, IN AN INERT SYSTEM TO PRODUCE A CATALYTICALLY ACTIVE HALIDE OF TITANIUM WHICH IS EFFECTIVE IN THE LOW PRESSURE POLYMERIZATION OF ETHYLENE AND OTHER A-OLEFINS.
Inventors
- 👤 Reginald F Roberts Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:45
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |