Patent US3009908A successfully refreshed from Google Patents.
US3009908A
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Thiophenol-modified ziegler catalyst, preparation thereof and polymerization of ethylene thereby
Assignee: Monsanto Chemicals Ltd
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Filing: 1956-09-14
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Granted: 1961-11-21
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Expires: 1976-09-14
Abstract
No abstract record available.
Inventors
- 👤 Harry M Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:58
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD WHICH COMPRISES POLYMERIZING AN ETHYLENICALLY UNSATURATED HYDROCARBON IN THE PRESENCE OF A ZIEGLER POLYMERIZATION CATALYST, ADAPTED FOR THE LOWPRESSURE POLYMERIZATION OF ETHYLENE, PREPARED BY THE INTERACTION OF (A) AN ALUMINUM COMPOUND OF THE GENERAL FORMULA R2A1X WHEREIN R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL AND ARYL RADICALS, AND X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, HALOGEN, ALKYL, CYCLOALKYL AND ARYL RADICALS, WITH (B) A SALT OF A GROUP IV-B TO GROUP VI-B METAL, AND MODIFIED BUT NOT DEACTIVATED BY TREATMENT WITH A THIOPHENOL.
Claim 2
Independent Claim
90 words
A METHOD WHICH COMPRISES POLYMERIZING AN ETHYLENICALLY UNSATURATED HYDROCARBON IN THE PRESENCE OF A ZIEGLER POLYMERIZATION CATALYST, ADAPTED FOR THE LOWPRESSURE POLYMERIZATION OF ETHYLENE, PREPARED BY THE INTERACTION OF (A) AN ALUMINUM COMPOUND OF THE GENERAL FORMULA R2A1X WHEREIN R IS SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL AND ARYL RADICALS, AND X IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN, HALOGEN, ALKYL, CYCLOALKYL AND ARYL RADICALS, WITH (B) A SALT OF A GROUP IV-B TO GROUP VI-B METAL, AND MODIFIED BUT NOT DEACTIVATED BY TREATMENT WITH A THIOPHENOL.
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) | 1964-11-20 | 1965-05-22 | 1965-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-20 | 1969-05-22 | 1969-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-20 | 1973-05-22 | 1973-11-21 | $7700.00 | Window Closed / Lapsed |