US2935483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica-alumina-magnesia catalyst
Assignee: ExxonMobil Oil Corp
•
Filing: 1956-01-05
•
Granted: 1960-05-03
•
Expires: 1976-01-05
Abstract
No abstract record available.
Inventors
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:58
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A COGELLED CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SILICA AND MINOR PROPORTIONS OF ALUMINA AND MAGNESIA IN WHICH THE ALUMINA CONTENT IS ABOUT 18.7 TO ABOUT 24.8 PERCENT BY WEIGHT, THE MAGNESIA CONTENT IS ABOUT 7.5 TO ABOUT 14.5 PERCENT BY WEIGHT, AND REMAINDER SILICA.
Claim 2
Dependent Claim
47 words
A COGELLED CATALYST CONSISTING ESSENTIALLY OF A MAJOR PROPORTION OF SILICA AND MINOR PROPORTIONS OF ALUMINA AND MAGNESIA IN WHICH THE ALUMINA CONTENT IS ABOUT 18.7 TO ABOUT 24.8 PERCENT BY WEIGHT, THE MAGNESIA CONTENT IS ABOUT 7.5 TO ABOUT 14.5 PERCENT BY WEIGHT, AND REMAINDER SILICA.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |