US3671432A
Expired / Lapsed
US
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Preparation of supported transition metal oxide polymerization catalysts
Assignee: Standard Oil Co
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Filing: 1969-10-23
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Granted: 1972-06-20
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Expires: 1989-10-23
Abstract
Abstract Polymerization catalysts are prepared by adsorbing water upon an inert support and extending a water-dispersible or soluble transition metal compound upon the support by mixing. The water is then removed and the transition metal compound converted to a highly oxidized state by calcination.
Inventors
- 👤 Edwin F Peters
- 👤 Omar O Juveland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:23
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
39 words
The process of claim 1 wherein said calcining is effected at a temperature within the range of from about 200* C. to about 1, 000* C. for a period of time of from about 0.25 to about 24 hours.
Claim 2
Dependent Claim
14 words
The process of claim 2 wherein said transition metal compound is a chromium compound.
Claim 3
Dependent Claim
14 words
The process of claim 2 wherein said transition metal compound is a vanadium compound.
References Cited (Backward Citations)
US2794005A
Cited
US3185651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |