US2796409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica-magnesia catalyst preparation
Assignee: ExxonMobil Oil Corp
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Filing: 1952-02-15
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Granted: 1957-06-18
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Expires: 1972-02-15
Abstract
No abstract record available.
Inventors
- 👤 Albert B Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:21
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/12; B21C37/126; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD FOR PREPARING A SILICA-MAGNESIA CATALYST COMPRISING SIMULTANEOUSLY COMBINING THREE SEPARATE STREAMS OF (1) AN ACID SOLUTION, (2) AN ALKALI METAL SILICATE SOLUTION, AND (3) AN AQUEOUS SUSPENSION OF CALCINED MAGNESIA TO YIELD AN ALKALINE HYDROSOL HAVING A PH IN THE RANGE OF 8 TO 11, THE MINIMUM PH OF SAID HYDROSOL BEING DEFINED BY THE EXPRESSION:
Claim 2
Independent Claim
58 words
A METHOD FOR PREPARING A SILICA-MAGNESIA CATALYST COMPRISING SIMULTANEOUSLY COMBINING THREE SEPARATE STREAMS OF (1) AN ACID SOLUTION, (2) AN ALKALI METAL SILICATE SOLUTION, AND (3) AN AQUEOUS SUSPENSION OF CALCINED MAGNESIA TO YIELD AN ALKALINE HYDROSOL HAVING A PH IN THE RANGE OF 8 TO 11, THE MINIMUM PH OF SAID HYDROSOL BEING DEFINED BY THE EXPRESSION:
References Cited (Backward Citations)
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US2565627A
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US2551014A
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US2698330A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |