Patent US3740384A successfully refreshed from Google Patents.
US3740384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerisation of mono-olefins with an organometallic zirconium complex-1,1,3,3 - tetraphenylsiloxane - 1,3 - diol catalyst
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1971-08-23
•
Granted: 1973-06-19
•
Expires: 1991-08-23
Abstract
Abstract A PROCESS FOR THE POLYMERISATION OF MONO-OLEFINS, PARTICULARLY ETHYLENE, IN WHICH THE OLEFIN IS CONTACTED WITH A CATALYST COMPRISING AN ORGANOMETALLIC ZIRCONIUM COMPLEX, PREFERABLY TETRABENZYLZIRCONIUM, AND 1,1,3,3-TETRAPHENYLSILOXANE-1,3-DIOL. PREFERABLY, THE POLYMERISATION IS PERFORMED IN SOLUTION.
Inventors
- 👤 D Ballard
- 👤 R Wyatt
- 👤 N Jones
- 👤 B Kilbourn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:37
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |