US3583958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for manufacture of olefincc polymers
Assignee: Mitsui Chemicals Inc
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Filing: 1968-04-08
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Granted: 1971-06-08
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Expires: 1988-04-08
Abstract
Abstract A POLYMERIZATION CATALYST WHICH IS PARTICULARLY USEFUL FOR THE POLYMERIZATION OF ALPHA OLEFINS OR ALPHA OLEFINS WITH ETHYLENE WHICH CATALYST IS CHARACTERIZED BY A UNIFORM QUALITY WITH EXCELLENT REPRODUCTIBILITY IN PRODUCING HIGHLY CRYSTALLINE POLYMERS UNDER RELATIVELY MILD CONDITIONS. SAID CATALYST COMPRISING (D) A MONOETHER HAVING AN ALKENYL GROUP IN ADDITION TO THE FOLLOWING THREE COMPONENTS: (A) A HALOGEN COMPOUND OF TITANIUM IN A VALENCY STATE BELOW ITS MAXIMUM VALENCY STATE; (B) AN ALUMINUM COMPOUND OF THE FORMULA RAIX2 AND (C) A METAL COMPLEX OF THE FORMULA M2M''F6.
Inventors
- 👤 Juntaro Sasaki
- 👤 Tadao Iwata
- 👤 Toshio Senoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:54
CPC Classifications
C; C08; C08F; C08F10/00
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |