Patent US2908674A successfully refreshed from Google Patents.
US2908674A
Expired / Lapsed
US
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Process and catalyst for production of olefin polymers
Assignee: Phillips Petroleum Co
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Filing: 1955-04-25
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Granted: 1959-10-13
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Expires: 1975-04-25
Abstract
No abstract record available.
Inventors
- 👤 Nowlin Gene
- 👤 Harold D Lyons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:56
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A METHOD FOR POLYMERIZING EHTYLENE WHICH COMPRISES, POLYMERIZING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF A MIXTURE OF FROM 0.1 TO 5 MOLS OF A MIXTURE OF DIETHYLALUMINUM CHLORIDE AND ETHYLALUMINUM DICHLORIDE PER MOL OF TITANIUM DIOXIDE, IN THE PRESENCE OF A HYDROCARBON DILUENT, INERT AND LIQUID UNDER CONDITIONS OF THE METHOD, AT A TEMPERATURE IN THE RANGE FROM 200 TO 350*F. AND A PRESSURE IN THE RANGE FROM 100 TO 1000 P.S.I.G.
Claim 2
Independent Claim
73 words
A METHOD FOR POLYMERIZING EHTYLENE WHICH COMPRISES, POLYMERIZING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF A MIXTURE OF FROM 0.1 TO 5 MOLS OF A MIXTURE OF DIETHYLALUMINUM CHLORIDE AND ETHYLALUMINUM DICHLORIDE PER MOL OF TITANIUM DIOXIDE, IN THE PRESENCE OF A HYDROCARBON DILUENT, INERT AND LIQUID UNDER CONDITIONS OF THE METHOD, AT A TEMPERATURE IN THE RANGE FROM 200 TO 350*F. AND A PRESSURE IN THE RANGE FROM 100 TO 1000 P.S.I.G.
References Cited (Backward Citations)
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US2710854A
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US2731453A
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US2721189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |