Patent US2773841A successfully refreshed from Google Patents.
US2773841A
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Method of preparing silica alumina or magnesia base catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-12-24
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Granted: 1956-12-11
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Expires: 1972-12-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles N Kimberlin
- 👤 Elroy M Gladrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:34
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/03; B01J37/036; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PREPARING HYDROCARBON CONVERSION CATALYSTS WHICH COMPRISES PREPARING MAGNESIA HYDROSOL, SUBJECTING THE SAID HYDROSAL TO PRESSURES FROM ABOUT 15 TO 1000 LBS, PER SQ. INCH GAUGE AND TEMPERATURES FROM ABOUT 212 TO ABOUT 550* F. FOR PERIODS OF FROM A FEW MINUTES UP TO ABOUT 24 HOURS TO LOWER THE SURFACE AREA AND INCREASE THE PORE VOLUME OF GEELS OBTAINABLE THEREFROM, COOLING THE PRESSURE TREATED HYDROSOL, DEPRESSING THE COOLED HYDROSOL, CONVERTING THE PRESSURE TREATED HYDROSOL TO HYDROGEL, IMPREGNATING THE RESULTANT MAGNESIA HYDROGEL WITH AN ACTIVE CATALYTIC COMPONENT AND HEATING OR CALCINING THE RESULTANT COMPOSITE TO ACTIVATE THE SAME.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PREPARING HYDROCARBON CONVERSION CATALYSTS WHICH COMPRISES PREPARING MAGNESIA HYDROSOL, SUBJECTING THE SAID HYDROSAL TO PRESSURES FROM ABOUT 15 TO 1000 LBS, PER SQ. INCH GAUGE AND TEMPERATURES FROM ABOUT 212 TO ABOUT 550* F. FOR PERIODS OF FROM A FEW MINUTES UP TO ABOUT 24 HOURS TO LOWER THE SURFACE AREA AND INCREASE THE PORE VOLUME OF GEELS OBTAINABLE THEREFROM, COOLING THE PRESSURE TREATED HYDROSOL, DEPRESSING THE COOLED HYDROSOL, CONVERTING THE PRESSURE TREATED HYDROSOL TO HYDROGEL, IMPREGNATING THE RESULTANT MAGNESIA HYDROGEL WITH AN ACTIVE CATALYTIC COMPONENT AND HEATING OR CALCINING THE RESULTANT COMPOSITE TO ACTIVATE THE SAME.
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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) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |