US3362946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating supported chromium oxide catalyst and polymerization therewith
Assignee: Phillips Petroleum Co
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Filing: 1964-06-01
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Granted: 1968-01-09
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Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 John P Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:54
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A PROCESS FOR POLYMERIZING ETHYL''ENE WHICH COMPRISES CONTACTING ETHYLENE UNDER POLYMERIZATION CONDITIONS WITH A CATALYST CONSISTING OF THE PRODUCT RESULTING FROM IMPREGNATING A SUPPORT OF SILCA AND UP TO EQUAL PARTS BY WEIGHT OF ALUMINA WITH A CHROMIUM COMPOUND CALCINABLE TO CHROMIUM OXIDE, HEATING THE RESULTING COMPOSITE IN DRY AIR FOR 30 MINUTES TO 30 HOURS AT A TEMPERATURE IN THE RANGE OF 1200 TO 1600*F. AND THEREAFTER CONTACTING THE ACTIVE CATALYST WITH CARBON MONOXIDE IN AN OTHERWISE INERT ATMOSPHERE FOR 1 MINUTE TO 4 HOURS, AT A TEMPERATURE ABOVE 700*F. AND UP TO 1000*F., AND RECOVERING A SOLID ETHYLENE POLYMER.
References Cited (Backward Citations)
US3166537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |