US2634241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying silica-alumina gel of manganese
Assignee: Standard Oil Co
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Filing: 1950-12-29
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Granted: 1953-04-07
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Expires: 1970-12-29
Abstract
No abstract record available.
Inventors
- 👤 Glenn M Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:19
CPC Classifications
B; B01; B01J; B01J21/00; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
63 words
A PROCESS FOR PURIFYING A MANGANESE-CONTAMINATED SILICA-ALUMINA GEL CATALYST WHICH COMPRISES CONTACTING SAID CATALYST WITH NO AQUEOUS SOLUTION OF AN ALUMINUM SALT FOR A SUFFICIENT TIME TO EFFECT BASE-EXCHANGE BETWEEN SAID MANGANESE AND SAID ALUMINUM SALT, WHEREBY ALUMINUM REPLACES SAID MANGANESE IN SAID SILICA-ALUMINA AND SAID MANGANESE IS DISSOLVED IN SAID SOLUTION, AND WITHDRAWING SAID SOLUTION, LEAVING SAID CATALYST SUBSTANTIALLY FREE FROM MANGANESE.
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) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |