US3767635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization of olefin
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-12-03
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Granted: 1973-10-23
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Expires: 1991-12-03
Abstract
Abstract OLEFIN POLYMERIZATION IS CONDUCTED USING A THREE COMPONENT CATALYST SYSTEM COMPRISING: (1) CHROMIUM OXIDE SUPPORTED ON SILICA OR SILICA-ALUMINA, (2) PENTAALKYLSILOXYALANE OR DIHYDROCARBYL ALUMINUM HYDROCARBON OXIDE AND (3) AN ORGANOALUMINUM COMPOUND HAVING THE FORMULA: AIRNX3-N WHEREIN R REPRESENTS A HYDROCARBON GROUP; X REPRESENTS A HALOGEN ATOM AND N REPRESENTS AN INTEGER OF 1-3.
Inventors
- 👤 K Yamaguchi
- 👤 M Hasuo
- 👤 I Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:18
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/905
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |