US2685569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silica-magnesia catalyst and method of preparation
Assignee: Davison Chemical Corp
•
Filing: 1951-06-27
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Granted: 1954-08-03
•
Expires: 1971-06-27
Abstract
No abstract record available.
Inventors
- 👤 Finley C Nicholson
- 👤 Jr Charles P Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:36
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF MANUFACTURING A SILICA-MAGNESIA CATALYST COMPRISING REACTING A COLLOIDAL COMPLEX MAGNESIUM OXY-SALT WITH A SODIUM SILICATE TO FORM A SILICA-MAGNESIA GEL, WASHING THE GEL WITH WATER TO REMOVE SOLUBLE SODIUM THEREFROM, CONTACTING THE RELATINOUS MAGNESIUM SILICATE WITH A SOLUTION OF A MAGNESIUM SALT TO REMOVE ZEOLITICALLY HELD SODIUM FROM THE GEL BY BASE EXCHANGE, AND DRYING AND ACTIVATING THE SUBSTANTIALLY SODIUM FREE PRODUCT.
Claim 2
Independent Claim
65 words
A METHOD OF MANUFACTURING A SILICA-MAGNESIA CATALYST COMPRISING REACTING A COLLOIDAL COMPLEX MAGNESIUM OXY-SALT WITH A SODIUM SILICATE TO FORM A SILICA-MAGNESIA GEL, WASHING THE GEL WITH WATER TO REMOVE SOLUBLE SODIUM THEREFROM, CONTACTING THE RELATINOUS MAGNESIUM SILICATE WITH A SOLUTION OF A MAGNESIUM SALT TO REMOVE ZEOLITICALLY HELD SODIUM FROM THE GEL BY BASE EXCHANGE, AND DRYING AND ACTIVATING THE SUBSTANTIALLY SODIUM FREE PRODUCT.
References Cited (Backward Citations)
US1577186A
Cited
US2323728A
Cited
US2271319A
Cited
US2467407A
Cited
US2565627A
Cited
US2498353A
Cited
US2546971A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |