Patent US2565627A successfully refreshed from Google Patents.
US2565627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coprecipitated silica-magnesia gel
Assignee: Davison Chemical Corp
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Filing: 1946-04-05
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Granted: 1951-08-28
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Expires: 1966-04-05
Abstract
No abstract record available.
Inventors
- 👤 James N Pryor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:58
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A METHOD OF PREPARING A MAGNESIA-SILICA CATALYST COMPRISING MIXING MAGNESIUM OXIDE WITH AN ALKALI METAL SILICATE SOLUTION AND THEN MIXING THE SLURRY OF MAGNESIUM OXIDE-ALKALI METAL SILICATE SOLUTION WITH AN INORGANIC ACID TO FORM A MAGNESIA-SILICA HYDROSOL, THEN GELLING THE SO FORMED HYDROSOL, WASHING THE RESULTING GEL, AND DRYING AND ACTIVATING THE WASHED GEL.
Claim 2
Independent Claim
54 words
A METHOD OF PREPARING A MAGNESIA-SILICA CATALYST COMPRISING MIXING MAGNESIUM OXIDE WITH AN ALKALI METAL SILICATE SOLUTION AND THEN MIXING THE SLURRY OF MAGNESIUM OXIDE-ALKALI METAL SILICATE SOLUTION WITH AN INORGANIC ACID TO FORM A MAGNESIA-SILICA HYDROSOL, THEN GELLING THE SO FORMED HYDROSOL, WASHING THE RESULTING GEL, AND DRYING AND ACTIVATING THE WASHED GEL.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |