Patent US3239497A successfully refreshed from Google Patents.
US3239497A
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Method of preparing a polymerization catalyst for olefins and olefin polymers
Assignee: Tokuyama Corp
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Filing: 1962-10-10
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Granted: 1966-03-08
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Expires: 1982-10-10
Abstract
No abstract record available.
Inventors
- 👤 Machida Kazuo
- 👤 Isobe Takeshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:02
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF PREPARING A POLYMERIZATION CATALYST FOR OLEFINS AND DIENES WHICH COMPRISES REACTING IN AN ATMOSPHERE OF OLEFIN GAS AND IN THE PRESENCE OF AN ORGANIC SOLVENT, (A) AT LEAST ONE METAL HALIDE IN WHICH THE METAL HAS A VALENCY LOWER THAN ITS MAXIMUM VALUE, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF GROUPS IVA, VA AND VIA OF THE PERIODIC TABLE; (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE TRANSITION METAL CYCLOPENTADIENYL COMPOUNDS, SODIUM PENTADIENYL AND DICYCLOPENTADIENE IN AN AMOUNT OF FROM 0.03 TO 0.3 MOL PER EACH MOL OF SAID METAL HALIDE; AND (C) A REDUCING METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALLS AND THE AMALGAM THEREOF.
Claim 2
Independent Claim
115 words
A METHOD OF PREPARING A POLYMERIZATION CATALYST FOR OLEFINS AND DIENES WHICH COMPRISES REACTING IN AN ATMOSPHERE OF OLEFIN GAS AND IN THE PRESENCE OF AN ORGANIC SOLVENT, (A) AT LEAST ONE METAL HALIDE IN WHICH THE METAL HAS A VALENCY LOWER THAN ITS MAXIMUM VALUE, SAID METAL BEING SELECTED FROM THE GROUP CONSISTING OF GROUPS IVA, VA AND VIA OF THE PERIODIC TABLE; (B) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE TRANSITION METAL CYCLOPENTADIENYL COMPOUNDS, SODIUM PENTADIENYL AND DICYCLOPENTADIENE IN AN AMOUNT OF FROM 0.03 TO 0.3 MOL PER EACH MOL OF SAID METAL HALIDE; AND (C) A REDUCING METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALLS AND THE AMALGAM THEREOF.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |