US2951816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization catalyst and production thereof
Assignee: Phillips Petroleum Co
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Filing: 1958-01-06
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Granted: 1960-09-06
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Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 Hogan John Paul
- 👤 Robert L Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C08; C08F; C08F10/00; C08F110/00; C08F110/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED CATALYST, WHICH PROCESS COMPRISES DEPOSITING CHROMIUM OXIDE ON A SUPPORT COMPONENT SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, AND THORIA, HEATING THE RESULTING COMPOSITE AT AN ELEVATED TEMPERATURE, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AND FOR A SUFFICIENT TIME TO IMPART, TO THE RESULTING MIXTURE, INCREASED CATALYTIC ACTIVITY FOR PROMOTING THE FORMATION OF NORMALLY SOLID POLYMERS OF OLEFINS, THE RESULTING CATALYST CONTAINING AT LEAST PART OF THE CHROMIUM IN THE HEXAVALENT STATE.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED CATALYST, WHICH PROCESS COMPRISES DEPOSITING CHROMIUM OXIDE ON A SUPPORT COMPONENT SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA, AND THORIA, HEATING THE RESULTING COMPOSITE AT AN ELEVATED TEMPERATURE, UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS, AND FOR A SUFFICIENT TIME TO IMPART, TO THE RESULTING MIXTURE, INCREASED CATALYTIC ACTIVITY FOR PROMOTING THE FORMATION OF NORMALLY SOLID POLYMERS OF OLEFINS, THE RESULTING CATALYST CONTAINING AT LEAST PART OF THE CHROMIUM IN THE HEXAVALENT STATE.
References Cited (Backward Citations)
US2401246A
Cited
GB751859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |