Patent US2220107A successfully refreshed from Google Patents.
Patent US2804433A successfully refreshed from Google Patents.
US2804433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silica-alumina composites
Assignee: Universal Oil Products Co
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Filing: 1952-12-29
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Granted: 1957-08-27
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Expires: 1972-12-29
Abstract
No abstract record available.
Inventors
- 👤 George L Hervert
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:14
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS OF PRODUCING A SILICA-ALUMINA COMPOSITE WHICH COMPRISES REACTING ALUMINUM METAL WITH WATER CONTAINING FROM ABOUT 0.1% TO ABOUT 90% BY WEIGHT OF SODIUM META SILICATE AS A CATALYST AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 705*F. UNDER SUFFICIENT PRESSURE TO MAINTAIN AN AQUEOUS LIQUID PHASE DURING THE REACTION AND FOR A SUFFICIENT TIME TO CONVERT THE METAL INTO ALUMINA, RECOVERING FROM SAID RECTION A REACTION MIXTURE SUBSTANTIALLY FREE OF UNCONVERTED ALUMIUM METAL BUT CONTAINING THE ALUMINA AND SAID SILICATE, ACIDIFYING SAID REACTION MIXTURE, THEREBY PRECIPITATING SILICA FROM THE SODIUM META SILICATE, SEPARATING RESULTANT SILICAALUMINA PARTICLES FROM THE REACTION MIXTURE AND CALCINING THE SAME.
Claim 2
Dependent Claim
107 words
THE PROCESS OF PRODUCING A SILICA-ALUMINA COMPOSITE WHICH COMPRISES REACTING ALUMINUM METAL WITH WATER CONTAINING FROM ABOUT 0.1% TO ABOUT 90% BY WEIGHT OF SODIUM META SILICATE AS A CATALYST AT A TEMPERATURE OF FROM ABOUT 212*F. TO ABOUT 705*F. UNDER SUFFICIENT PRESSURE TO MAINTAIN AN AQUEOUS LIQUID PHASE DURING THE REACTION AND FOR A SUFFICIENT TIME TO CONVERT THE METAL INTO ALUMINA, RECOVERING FROM SAID RECTION A REACTION MIXTURE SUBSTANTIALLY FREE OF UNCONVERTED ALUMIUM METAL BUT CONTAINING THE ALUMINA AND SAID SILICATE, ACIDIFYING SAID REACTION MIXTURE, THEREBY PRECIPITATING SILICA FROM THE SODIUM META SILICATE, SEPARATING RESULTANT SILICAALUMINA PARTICLES FROM THE REACTION MIXTURE AND CALCINING THE SAME.
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |