US3766158A
Expired / Lapsed
US
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Process for polymerization of olefins
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-06-04
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Granted: 1973-10-16
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Expires: 1991-06-04
Abstract
Abstract OLEFIN POLYMERIZATION IS CONDUCTED USING A TWO COMPONENET CATALYST SYSTEM COMPRISING (1) A HYDROCARBON INSOLUBLE SOLID PREPARED BY REDUCING A MIXTURE OF TITANIUM TETRAHALIDE AND TRIALKYL VANADATE WITH AN ORGANO ALUMINUM COMPOUND AND (2) AN ORGANO ALUMINUM COMPOUND.
Inventors
- 👤 K Yamaguchi
- 👤 N Enokido
- 👤 H Saruwatari
- 👤 T Tanaka
- 👤 S Okano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:35
CPC Classifications
C; C08; C08F; C08F10/00; C08F136/00; C08F136/02; C08F136/04; C08F136/06; C08F236/00; C08F236/02; C08F236/04
Claims Analysis
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |