US2969348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization catalyst and process
Assignee: Phillips Petroleum Co
•
Filing: 1956-08-20
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Granted: 1961-01-24
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Expires: 1976-08-20
Abstract
No abstract record available.
Inventors
- 👤 William L Fawcett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/866; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A SOLID POLYMER HAVING ENHANCED FLEXIBILITY, WHICH PROCESS COMPRISES CONTACTING ETHYLENE, AT A TEMPERATURE IN THE RANGE 150 TO 325*F. WITH A CATALYST ACTIVE FOR ETHYLENE POLYMERIZATION AND PREPARED BY DEPOSITING NICKEL OXIDE UPON ONE PORTION OF SILICA-ALUMINA, DEPOSITION CHROMIUM OXIDE UPON A SEPARATE PORTION OF SILICA-ALUMINA, HEATING AND MIXING THE COMPOSITES THUS OBTAINED TO OBTAIN A HEXAVALENT CHROMIUM CONTENT OF SAID CATALYST OF AT LEAST 0.1 WEIGHT PERCENT, THE TOTAL OF NICKEL PLUS CHROMIUM CONTENT IN SAID CATALYST BEING WITHIN THE RANGE 1 TO 4 PERCENT OF THE TOTAL CATALYST WEIGHT, AND THE MOL RATIO OF NICKEL TO CHROMUM IN SAID CATALYST BEING WITHIN THE RANGE 0.2:1 TO 2:1.
Claim 2
Dependent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A SOLID POLYMER HAVING ENHANCED FLEXIBILITY, WHICH PROCESS COMPRISES CONTACTING ETHYLENE, AT A TEMPERATURE IN THE RANGE 150 TO 325*F. WITH A CATALYST ACTIVE FOR ETHYLENE POLYMERIZATION AND PREPARED BY DEPOSITING NICKEL OXIDE UPON ONE PORTION OF SILICA-ALUMINA, DEPOSITION CHROMIUM OXIDE UPON A SEPARATE PORTION OF SILICA-ALUMINA, HEATING AND MIXING THE COMPOSITES THUS OBTAINED TO OBTAIN A HEXAVALENT CHROMIUM CONTENT OF SAID CATALYST OF AT LEAST 0.1 WEIGHT PERCENT, THE TOTAL OF NICKEL PLUS CHROMIUM CONTENT IN SAID CATALYST BEING WITHIN THE RANGE 1 TO 4 PERCENT OF THE TOTAL CATALYST WEIGHT, AND THE MOL RATIO OF NICKEL TO CHROMUM IN SAID CATALYST BEING WITHIN THE RANGE 0.2:1 TO 2:1.
References Cited (Backward Citations)
US2435551A
Cited
US2581228A
Cited
US2510189A
Cited
US2666756A
Cited
US2750261A
Cited
US2691647A
Cited
US2825721A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |