Patent US2526907A successfully refreshed from Google Patents.
US2526907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coprecipitation of silica-alumina
Assignee: Universal Oil Products Co
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Filing: 1948-09-29
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Granted: 1950-10-24
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 Schmerling Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:54
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR THE MANUFACTURE OF AN ALUMINA-SILICA COMPOSITE WHICH COMPRISES ADMIXING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WITH AN AQUEOUS ALUMINA SOL CONTAINING IN SOLUTION AN ORGANIC ACID HAVING A DISSOCIATION CONSTANT OF LESS THAN 1X10**-3 IN SUFFICIENT QUANTITY TO HYDROLYZE SAID SILICATE TO AN AQUEOUS SILICA SOL AND CONTINUING THE PERIOD OF REACTION FOR A TIME SUFFICIENT TO FORM A PRECIPITATE OF ALUMINA AND SILICA CO-GEL.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE MANUFACTURE OF AN ALUMINA-SILICA COMPOSITE WHICH COMPRISES ADMIXING AN AQUEOUS SOLUTION OF AN ALKALI METAL SILICATE WITH AN AQUEOUS ALUMINA SOL CONTAINING IN SOLUTION AN ORGANIC ACID HAVING A DISSOCIATION CONSTANT OF LESS THAN 1X10**-3 IN SUFFICIENT QUANTITY TO HYDROLYZE SAID SILICATE TO AN AQUEOUS SILICA SOL AND CONTINUING THE PERIOD OF REACTION FOR A TIME SUFFICIENT TO FORM A PRECIPITATE OF ALUMINA AND SILICA CO-GEL.
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) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |