Patent US2919267A successfully refreshed from Google Patents.
US2919267A
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Polymerization catalysts and processes
Assignee: Standard Oil Co
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Filing: 1956-03-28
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Granted: 1959-12-29
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Expires: 1976-03-28
Abstract
No abstract record available.
Inventors
- 👤 Omar O Juveland
- 👤 Field Edmund
- 👤 Herbert N Friedlander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:50
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A POLYMERIZATION PROCESS, THE STEPS OF CONTACTING ETHYLENE UNDER POLYMERIZATION REACTION CONDITIONS WITH AN INERT LIQUID REACTION MEDIUM CONTAINING A CATALYST CONSISTING ESSENTIALLY OF CALCIUM HYDRIDE, AN ALUMINUM HALIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRICHLORIDE, ALUMINUM TRIBROMIDE AND ALUMINUM CHLOROBROMIDES AND A MEMBER OF THE GROUP CONSISTING OF THE CHLORIDES OF TITANIUM, VANADIUM AND TUNGSTEN, THE MOLAR RATIO OF SAID ALUMINUM HALIDE TO SAID CHLORIDE BEING AT LEAST ABOUT 1, THE EQUIVALENT FRACTION OF SAID CALCIUM HYDRIDE BEING AT LEAST EQUAL TO THE EQUIVALENT FRACTION OF SAID ALUMINUM HALIDE IN THE CATALYST MIXTURE.
Claim 2
Dependent Claim
96 words
IN A POLYMERIZATION PROCESS, THE STEPS OF CONTACTING ETHYLENE UNDER POLYMERIZATION REACTION CONDITIONS WITH AN INERT LIQUID REACTION MEDIUM CONTAINING A CATALYST CONSISTING ESSENTIALLY OF CALCIUM HYDRIDE, AN ALUMINUM HALIDE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRICHLORIDE, ALUMINUM TRIBROMIDE AND ALUMINUM CHLOROBROMIDES AND A MEMBER OF THE GROUP CONSISTING OF THE CHLORIDES OF TITANIUM, VANADIUM AND TUNGSTEN, THE MOLAR RATIO OF SAID ALUMINUM HALIDE TO SAID CHLORIDE BEING AT LEAST ABOUT 1, THE EQUIVALENT FRACTION OF SAID CALCIUM HYDRIDE BEING AT LEAST EQUAL TO THE EQUIVALENT FRACTION OF SAID ALUMINUM HALIDE IN THE CATALYST MIXTURE.
References Cited (Backward Citations)
US2456326A
Cited
US2577591A
Cited
US2542610A
Cited
US2700663A
Cited
US2710854A
Cited
BE534792A
Cited
US2832759A
Cited
US2827447A
Cited
US2846427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-28 | 1963-06-29 | 1963-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-28 | 1967-06-29 | 1967-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-28 | 1971-06-29 | 1971-12-29 | $7700.00 | Window Closed / Lapsed |