US2493896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silica-alumina catalyst
Assignee: Gulf Research and Development Co
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Filing: 1947-12-05
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Granted: 1950-01-10
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Expires: 1967-12-05
Abstract
No abstract record available.
Inventors
- 👤 William A Pardee
- 👤 Jr George E Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:39
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; Y; Y10; Y10S; Y10S502/00; Y10S502/506
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR PREPARING A SILICA-ALUMINA CATALYST WHICH COMPRISES DEPOSITING ON ACTIVATED ALUMINA AN ORGANIC COMPOUND CAPABLE OF YIELDING SILICA WHEN SUBJECTED TO HEAT AND THE CATALYTIC INFLUENCE OF ACTIVATED ALUMINA, SAID ORGANIC COMPOUND BEING DEPOSITED ON THE ALUMINA IN AMOUNT SUFFICIENT TO YIELD A SILICA-ALUMINA CATALYST CONTAINING BETWEEN ABOUT 1 AND 50 PER CENT SILICA BY WEIGHT, HEATING THE MIXTURE OF ALUMINA AND THE ORGANIC COMPOUND DEPOSITED THEREON TO A TEMPERATURE SUFFICIENT TO CATALYTICALLY DECOMPOSE THE DEPOSITED ORGANIC COMPOUND INTO SILICA WITHOUT CAUSING IT TO DISTILL, AND THEREAFTER CALCINING THE RESULTANT PRODUCT.
Claim 2
Independent Claim
93 words
A METHOD FOR PREPARING A SILICA-ALUMINA CATALYST WHICH COMPRISES DEPOSITING ON ACTIVATED ALUMINA AN ORGANIC COMPOUND CAPABLE OF YIELDING SILICA WHEN SUBJECTED TO HEAT AND THE CATALYTIC INFLUENCE OF ACTIVATED ALUMINA, SAID ORGANIC COMPOUND BEING DEPOSITED ON THE ALUMINA IN AMOUNT SUFFICIENT TO YIELD A SILICA-ALUMINA CATALYST CONTAINING BETWEEN ABOUT 1 AND 50 PER CENT SILICA BY WEIGHT, HEATING THE MIXTURE OF ALUMINA AND THE ORGANIC COMPOUND DEPOSITED THEREON TO A TEMPERATURE SUFFICIENT TO CATALYTICALLY DECOMPOSE THE DEPOSITED ORGANIC COMPOUND INTO SILICA WITHOUT CAUSING IT TO DISTILL, AND THEREAFTER CALCINING THE RESULTANT PRODUCT.
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) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |