Patent US3249558A successfully refreshed from Google Patents.
US3249558A
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Method for the preparation of vanadium catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-08-31
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Granted: 1966-05-03
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Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/847; B01J23/8472; B01D; B01D53/00; B01D53/34; B01D53/92; B01D53/94; B01D53/944; B01J23/16; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/682
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
AN IMPROVED METHOD FOR THE PREPARATION OF VANADIUM BASED INTERNAL COMBUSTION ENGINE EXHAUST GAS OXIDATION CATALYSTS CONSISTING ESSENTIALLY OF IMPREGNATING AN ACTIVATED ALUMINA SUPPORT WITH A MINERAL ACID, THEN IMPREGNATING WITH A SOLUTION CONTAINING SODIUM HYDROXIDE AND VANADIUM PENTOXIDE HAVING THE RESPECTIVE MOLAR RATION OF FROM 2/1 TO 4/1; WASHING TO REMOVE MOST OF THE SODIUM SALTS; THEREAFTER IMPREGNATING THE MATERIAL WITH A SOLUTION OF THE SALT OF A METAL OXIDATION CATALYST AND FINALLY CALCINING THE RESULTING COMPOSITION.
Claim 2
Dependent Claim
78 words
AN IMPROVED METHOD FOR THE PREPARATION OF VANADIUM BASED INTERNAL COMBUSTION ENGINE EXHAUST GAS OXIDATION CATALYSTS CONSISTING ESSENTIALLY OF IMPREGNATING AN ACTIVATED ALUMINA SUPPORT WITH A MINERAL ACID, THEN IMPREGNATING WITH A SOLUTION CONTAINING SODIUM HYDROXIDE AND VANADIUM PENTOXIDE HAVING THE RESPECTIVE MOLAR RATION OF FROM 2/1 TO 4/1; WASHING TO REMOVE MOST OF THE SODIUM SALTS; THEREAFTER IMPREGNATING THE MATERIAL WITH A SOLUTION OF THE SALT OF A METAL OXIDATION CATALYST AND FINALLY CALCINING THE RESULTING COMPOSITION.
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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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |