Patent US2929807A successfully refreshed from Google Patents.
US2929807A
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Polymerization process for producing copolymers of ethylene and higher 1-olefins
Assignee: Phillips Petroleum Co
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Filing: 1957-05-13
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Granted: 1960-03-22
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Expires: 1977-05-13
Abstract
No abstract record available.
Inventors
- 👤 Gerald T Leatherman
- 👤 Paul E Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:06
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PRODUCING A COPOLYMER WHICH COMPRISES REACTING ETHYLENE WITH A HIGHER 1-OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND 1-BUTENE, SAID HIGHER OLEFIN COMPRISING FROM 10 TO 20% BY WEIGHT OF THE TOTAL OLEFINS REACTED, IN THE PRESENCE OF A CATALYST COMPRISING AS THE SOLE ESSENTIAL CATALYTIC INGREDIENTS CHROMIUM OXIDE, INCLUDING HEXAVALENT CHROMIUM, ON A SUPPORT SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, THORIA, ZIRCONIA AND COMPOSITES THEREOF, AT A TEMPERATURE IN THE RANGE OF 160 TO 300*F. AND REMOVING FROM THE RESULTING PRODUCT THE COPOLYMER WHICH IS SOLUBLE IN CYCLOHEXANE AT A TEMPERATURE IN THE RANGE OF 70 TO 100*F.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PRODUCING A COPOLYMER WHICH COMPRISES REACTING ETHYLENE WITH A HIGHER 1-OLEFIN SELECTED FROM THE GROUP CONSISTING OF PROPYLENE AND 1-BUTENE, SAID HIGHER OLEFIN COMPRISING FROM 10 TO 20% BY WEIGHT OF THE TOTAL OLEFINS REACTED, IN THE PRESENCE OF A CATALYST COMPRISING AS THE SOLE ESSENTIAL CATALYTIC INGREDIENTS CHROMIUM OXIDE, INCLUDING HEXAVALENT CHROMIUM, ON A SUPPORT SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, THORIA, ZIRCONIA AND COMPOSITES THEREOF, AT A TEMPERATURE IN THE RANGE OF 160 TO 300*F. AND REMOVING FROM THE RESULTING PRODUCT THE COPOLYMER WHICH IS SOLUBLE IN CYCLOHEXANE AT A TEMPERATURE IN THE RANGE OF 70 TO 100*F.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |