US2944049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefins in halogencontaining diluent
Assignee: Phillips Petroleum Co
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Filing: 1957-11-25
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Granted: 1960-07-05
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Expires: 1977-11-25
Abstract
No abstract record available.
Inventors
- 👤 Jr James T Edmonds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:18
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
115 words
A METHOD FOR POLYMERIZING EHTYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF (1) CHROMIUM OXIDE, AT LEAST PART OF THE CHROMIUM BEING IN THE HEXAVALENT STATE, SUPPORTED ON SILICA AND ALUMINA, AND (2) A COMPOUND HAVING THE FORMULA AIR3, WHEREIN R IS AN ALKYL RADICAL HAVING UP TO 20 CARBON ATOMS, THE AMOUNT OF THE AIR3 COMPOUND IN SAID CATALYST BEING IN THE RANGE OF 0.5 TO 5 PARTS BY WEIGHT PER PART OF SAID CHROMIUM OXIDE AND SAID SILICA AND ALUMINA, SAID CONTACTING OCCURRING IN THE PRESENCE OF CARBON TETRACHLORIDE AT A TEMPERATURE IN THE RANGE OF ZERO TO 250*F. AND A PRESSURE IN THE RANGE OF 100 TO 500 P.S.I.G.
References Cited (Backward Citations)
BE534792A
Cited
US2824089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |