US2922767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst and preparation thereof
Assignee: Engelhard Industries Inc
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Filing: 1957-03-12
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Granted: 1960-01-26
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Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Jr John H Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:48
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN THE PROCESS OF PREPARING A CATALYTICALLY ACTIVE METAL-ALUMINA CATALYST BY IMPREGNATION OF GAMMA ALUMINA WITH THE CATALYTICALLY ACTIVE METAL, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE GAMMA ALUMINA WITH WATER TO REHYDRATE AT LEAST ABOUT 10% UP TO ABOUT 75% OF THE GAMMA ALUMINA, IMPREGANATING THE RESULTING ALUMINA BASE WITH THE CATALYTICALLY ACTIVE METAL, AND CALCINING THE METAL IMPREGNATED ALUMINA BASE TO PROVIDE A CATALYTICALLY ACTIVE METAL-ALUMINA CATALYST.
Claim 2
Dependent Claim
68 words
IN THE PROCESS OF PREPARING A CATALYTICALLY ACTIVE METAL-ALUMINA CATALYST BY IMPREGNATION OF GAMMA ALUMINA WITH THE CATALYTICALLY ACTIVE METAL, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE GAMMA ALUMINA WITH WATER TO REHYDRATE AT LEAST ABOUT 10% UP TO ABOUT 75% OF THE GAMMA ALUMINA, IMPREGANATING THE RESULTING ALUMINA BASE WITH THE CATALYTICALLY ACTIVE METAL, AND CALCINING THE METAL IMPREGNATED ALUMINA BASE TO PROVIDE A CATALYTICALLY ACTIVE METAL-ALUMINA CATALYST.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |