US2498353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making activated magnesium silicates
Assignee: Individual
•
Filing: 1946-12-23
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Granted: 1950-02-21
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Expires: 1966-12-23
Abstract
No abstract record available.
Inventors
- 👤 Ernest C Bierce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/22; B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE PROCESS OF MAKING MAGNESIUM SILICATE OF HIGH DECOLORIZING CAPACITY COMPRISING MIXING AN AQUEOUS SOLUTION OF SODIUM SILICATE WITH A PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF A WATER SOLUBLE MINERAL ACID AND AN ALKALI METAL SALT OF A MINERAL ACID IN AN AMOUNT LESS THAN THAT REQUIRED TO INITIATE PRECIPITATION OF AN INSOLUBLE PRECIPITATE AT THE TEMPERATURE OF THE MIXTURE, HEATING THE MIXTURE UNTIL AN INSOLUBLE PRECIPITATE BEGINS TO FORM, THEN ADDING A WATER SOLUBLE MAGNESIUM SALT, AND CONTINUING THE HEATING UNTIL MAGNESIUM SILICATE IS FORMED.
Claim 2
Dependent Claim
87 words
THE PROCESS OF MAKING MAGNESIUM SILICATE OF HIGH DECOLORIZING CAPACITY COMPRISING MIXING AN AQUEOUS SOLUTION OF SODIUM SILICATE WITH A PRECIPITANT SELECTED FROM THE GROUP CONSISTING OF A WATER SOLUBLE MINERAL ACID AND AN ALKALI METAL SALT OF A MINERAL ACID IN AN AMOUNT LESS THAN THAT REQUIRED TO INITIATE PRECIPITATION OF AN INSOLUBLE PRECIPITATE AT THE TEMPERATURE OF THE MIXTURE, HEATING THE MIXTURE UNTIL AN INSOLUBLE PRECIPITATE BEGINS TO FORM, THEN ADDING A WATER SOLUBLE MAGNESIUM SALT, AND CONTINUING THE HEATING UNTIL MAGNESIUM SILICATE IS FORMED.
References Cited (Backward Citations)
US1999210A
Cited
US2390556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |