US3179647A
Expired / Lapsed
US
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Polymerisation catalysts consisting of an aluminum alkyl and a rare earth metal chloride or oxide
Assignee: Imperial Chemical Industries Ltd
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Filing: 1958-01-16
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Granted: 1965-04-20
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Expires: 1978-01-16
Abstract
No abstract record available.
Inventors
- 👤 Mulley Richard Derek
- 👤 Small Percy Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:12
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02; C08F10/00; G; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/18; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
A PROCESS FOR POLYMERISING ETHYLENE WHICH COMPRISES CONTACTING THE ETHYLENE WITH A CATALYST OBTAINED BY TREATING AT LEAST ONE LANTHANUM COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE OXIDE AND CHLORIDE OF LANTHANUM, WITH AN ALUMINUM ALKYL.
References Cited (Backward Citations)
US2030283A
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US2410558A
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BE533362A
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BE538782A
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FR1135808A
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FR1136818A
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US2907757A
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US2921060A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |