Patent US2582099A successfully refreshed from Google Patents.
US2582099A
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Preparation of silica-magnesia bead catalyst
Assignee: NAT ALUMINATED CORP
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Filing: 1949-07-09
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Granted: 1952-01-08
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Expires: 1969-07-09
Abstract
No abstract record available.
Inventors
- 👤 David G Braithwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:40
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
A PROCESS FOR THE PREPARATION OF AN IMPROVED SILICA-MAGNESIA CATALYST WHCIH CONSISTS ESSENTIALLY OF INTIMATELY MIXING SILICA HYDROGEL MICROSPHERES AND A MAGNESIUM COMPOUND FROM THE GROUP CONSISTING OF MAGNESIUM OXIDE AND MAGNESIUM HYDROXIDE IN AN AQUEOUS SLURRY AT A TEMPERATURE WITHIN THE RANGE OF 125 DEGREES F. TO 175 DEGREES F. FOR A PERIOD OF 1/2 HOUR TO 1 1/2 HOURS, SEPARATING THE WATER AND DRYING TO A MOISTURE CONTENT OF 10% TO 15% AT A TEMPERATURE OF 500 DEGRESS F. TO 800 DEGREES F.
References Cited (Backward Citations)
US2399261A
Cited
US2435158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |