US2688002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a silica-magnesia-alumina gel catalyst
Assignee: Houdry Process Corp
•
Filing: 1950-03-11
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Granted: 1954-08-31
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Expires: 1970-03-11
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas H Milliken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:55
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF CATALYST PREPARATION WHICH COMPRISES PREPARING AN ADMIXTURE OF FINELY DIVIDED KAOLIN CLAY WITH SILICA SOL AND MAGNESIUM HYDROXIDE, SETTING THE SOL TO HYDROGEL, AGING SAID HYDROGEL IN WET STATE AND THEREAFTER DEYING THE SAME, AT LEAST PART OF SAID AGING BEING EFFECTED BY TREATING THE HYDROGEL WITH AN AQUEOUS SOLUTION OF A MAGNESIUM SALT.
Claim 2
Independent Claim
57 words
THE METHOD OF CATALYST PREPARATION WHICH COMPRISES PREPARING AN ADMIXTURE OF FINELY DIVIDED KAOLIN CLAY WITH SILICA SOL AND MAGNESIUM HYDROXIDE, SETTING THE SOL TO HYDROGEL, AGING SAID HYDROGEL IN WET STATE AND THEREAFTER DEYING THE SAME, AT LEAST PART OF SAID AGING BEING EFFECTED BY TREATING THE HYDROGEL WITH AN AQUEOUS SOLUTION OF A MAGNESIUM SALT.
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Cited
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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) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |