Patent US3168484A successfully refreshed from Google Patents.
US3168484A
Expired / Lapsed
US
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Production of polymerization catalyst
Assignee: Shell USA Inc
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Filing: 1961-04-26
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Granted: 1965-02-02
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Expires: 1981-04-26
Abstract
No abstract record available.
Inventors
- 👤 Willem F Engel
- 👤 Krijger Pieter
- 👤 Mostert Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:30
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/901; Y10S526/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR THE PRODUCTION OF A FLUIDIZABLE CATALYST COMPOSITION SUITABLE FOR THE POLYMERIZATAION OF ETHYLENICALLY UNSATURATED HYDROCARBON WHICH COMPRIESE CONTACTING AN ALUMINUM ALKYL COMPOUND WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND TITANIUM TRIHALIDES AND MIXTURES THEREOF IN THE PRESENCE OF A SOLID FLUIDIZED INERT DILUENT, SAID ALUMINUM ALKYL COMPOUND AND TRIHALIDES BEING CONTACTED AT A RATE SUCH THAT THE FREE-FLOWING POWDER OF THE TRIHALIDES IS CONTINUALLY PRESERVED.
Claim 2
Dependent Claim
72 words
A PROCESS FOR THE PRODUCTION OF A FLUIDIZABLE CATALYST COMPOSITION SUITABLE FOR THE POLYMERIZATAION OF ETHYLENICALLY UNSATURATED HYDROCARBON WHICH COMPRIESE CONTACTING AN ALUMINUM ALKYL COMPOUND WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND TITANIUM TRIHALIDES AND MIXTURES THEREOF IN THE PRESENCE OF A SOLID FLUIDIZED INERT DILUENT, SAID ALUMINUM ALKYL COMPOUND AND TRIHALIDES BEING CONTACTED AT A RATE SUCH THAT THE FREE-FLOWING POWDER OF THE TRIHALIDES IS CONTINUALLY PRESERVED.
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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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |