US3757002A
Expired / Lapsed
US
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Pported diarene chromium compounds catalytic polymerization of olefins using cyclopentadiene modified su
Assignee: Union Carbide Corp
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Filing: 1971-09-24
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Granted: 1973-09-04
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Expires: 1991-09-24
Abstract
Abstract DIARENE CHROMIUM COMPOUNDS WHEN SUPPORTED ON AN INORGANIC OXIDE AND MODIFIED WITH CYCLOPENTADIENE ARE CATALYTICALLY ACTIVE FOR THE POLYMERIZATIN OF OLEFINS, PARTICULARLY ETHYLENE, TO PRODUCE HIGH MOLECULAR WEIGHT SOLID POLYMERS AND THESE CATALYSTS SHOW AN UNUSUAL UTILITY, WHEN USED WITH HYDROGEN, TO CONTROL THE MELT INDEX OF THE POLYMERS MADE THEREWITH.
Inventors
- 👤 F Karol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:47
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |