US3756998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
L catalysts polymerization of olefins using supported pi arenechromium tricarbony
Assignee: Union Carbide Corp
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Filing: 1971-04-23
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Granted: 1973-09-04
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Expires: 1991-04-23
Abstract
Abstract $-ARENECHROMIUM TRICRBONYLS WHEN SUPPORTED ON AN ACTIVATED SILICA OR SILICA-ALUMINA SUPPORT BECOME CATALYTICALLY ACTIVE FOR THE POLYMERIZATION OF OLEFINS, PARTICULARLY ETHYLENE, TO HIGH MOLECULAR WEIGTHT SOLID POLYMERS UNDER A VARIETY OF CONDITIONS.
Inventors
- 👤 G Karapinka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:23
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) | 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 |