US3102876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene copolymers stabilized with a conjugated diene
Assignee: Phillips Petroleum Co
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Filing: 1960-07-29
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Granted: 1963-09-03
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Expires: 1980-07-29
Abstract
No abstract record available.
Inventors
- 👤 John P Hogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:37
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01; C08F; C08F10/00; C08L; C08L23/00; C08L23/02; C08L23/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A PROCESS FOR THE POLYMERIZATION OF A MIXTURE OF 1-OLEFINS COMPRISING A MAJOR AMOUNT OF ETHYLENE AND A MINOR AMOUNT OF AT LEAST ONE COPOLYMERIZABLE 1-OLEFIN SELECTED FRM THE GROUP CONSISTING OF PROPYLENE, 1-BUTENE, 1-PENYE, 1-HEXENE, 1-OCTENE, 4-METHYL-1-PENTENE AND 5METHYL-1-HEXANE UNDER POLYMERIZATION CONDITIONS IN THE PRESENCE OF A HYDROCARBON DILUENT AND A CATALYST COMPRISING CHROMIUM OXIDE AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, AND THORIA, AT LEAST PART OF THE CHROMIUM BEING IN THE HEXAVALENT STATE, PRODUCING A COPOLYMER PRODUCT AND RECOVERING SAID PRODUCT HAVING A TENDENCY TO BLEED, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID MIXTURE IN THE PRESENCE OF A STABLIZING AMOUNT OF STABLIZER SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIENES HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
125 words
IN A PROCESS FOR THE POLYMERIZATION OF A MIXTURE OF 1-OLEFINS COMPRISING A MAJOR AMOUNT OF ETHYLENE AND A MINOR AMOUNT OF AT LEAST ONE COPOLYMERIZABLE 1-OLEFIN SELECTED FRM THE GROUP CONSISTING OF PROPYLENE, 1-BUTENE, 1-PENYE, 1-HEXENE, 1-OCTENE, 4-METHYL-1-PENTENE AND 5METHYL-1-HEXANE UNDER POLYMERIZATION CONDITIONS IN THE PRESENCE OF A HYDROCARBON DILUENT AND A CATALYST COMPRISING CHROMIUM OXIDE AND AT LEAST ONE MATERIAL SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, AND THORIA, AT LEAST PART OF THE CHROMIUM BEING IN THE HEXAVALENT STATE, PRODUCING A COPOLYMER PRODUCT AND RECOVERING SAID PRODUCT HAVING A TENDENCY TO BLEED, THE IMPROVEMENT WHICH COMPRISES POLYMERIZING SAID MIXTURE IN THE PRESENCE OF A STABLIZING AMOUNT OF STABLIZER SELECTED FROM THE GROUP CONSISTING OF CONJUGATED DIENES HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2825721A
Cited
US2944048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |