US2775562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of a silica-alumina cracking catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-03-06
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Granted: 1956-12-25
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Expires: 1973-03-06
Abstract
No abstract record available.
Inventors
- 👤 James A Dinwiddie
- 👤 Max A Mosesman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:48
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A METHOD FOR PRODUCING A HEAT STABLE CATALYST SUITABLE FOR CONVERTING HYDROCARBONS WHICH COMPRISES ADMIXING AN ALCOHOL SOLUBLE AND HYDROLYZABLE SILICON COMPOUND WITH ALUMINUM ALCOHOLATE, HYDROLYZING THE ADMIXTURE BY CONTACTING SAME WITH WATER VAPOR TO FORM A PRECIPITATE OF SAID SILICON COMPOUND AND BOEHMITE, DRYING THE PRECIPITATE AND CALCINING THE DRIED PRECIPITATE AT A SUFFICIENTLY HIGH TEMPERATURE TO FORM A HEAT STABLE CATALYST COMPRISING SILCIA AND ALUMINA.
Claim 2
Independent Claim
67 words
A METHOD FOR PRODUCING A HEAT STABLE CATALYST SUITABLE FOR CONVERTING HYDROCARBONS WHICH COMPRISES ADMIXING AN ALCOHOL SOLUBLE AND HYDROLYZABLE SILICON COMPOUND WITH ALUMINUM ALCOHOLATE, HYDROLYZING THE ADMIXTURE BY CONTACTING SAME WITH WATER VAPOR TO FORM A PRECIPITATE OF SAID SILICON COMPOUND AND BOEHMITE, DRYING THE PRECIPITATE AND CALCINING THE DRIED PRECIPITATE AT A SUFFICIENTLY HIGH TEMPERATURE TO FORM A HEAT STABLE CATALYST COMPRISING SILCIA AND ALUMINA.
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) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |