Patent US2542846A successfully refreshed from Google Patents.
Patent US3206303A successfully refreshed from Google Patents.
US3206303A
Expired / Lapsed
US
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Process for precipitating solubilized silica from acidic aqueous media
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1960-09-19
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Granted: 1965-09-14
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:54
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/44; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN THE PROCESS FOR THE RECOVERY OF DESIRED DISSOLVED METAL VALUES FROM AN AQUEOUS MEDIUM WHICH ALSO CONTAINS SOLUBILIZED SILICA WHEREIN THE SOLUBLIZED SILICA INTERFERES WITH THE RECOVERY OF THE DESIRED METAL VALUES, THE IMPROVEMENT COMPRISING PRECIPITATING SOLUBILIZED SILICA FROM THE AQUEOUS MEDIUM BY HEATING AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF A SOLUBLE SUBSTANCE YIELDING ALUMINUM ION IN SOLUTION, THE AQUEOUS MEDIUM HAVING A PH VALUE OF ABOUT 2.0-3.5 ADN THE RATIO BY WEIGHT OF ALUMINUM ION IN SOLUTION TO SOLUBILIZED SILICA WHEN CALCULATED AS AL/SIO2 BEING BETWEEN ABOUT 0.01:1 AND ABOUT 1.17:1, AND THEREAFTER RECOVERING THE DESIRED METAL VALUES.
Claim 2
Dependent Claim
102 words
IN THE PROCESS FOR THE RECOVERY OF DESIRED DISSOLVED METAL VALUES FROM AN AQUEOUS MEDIUM WHICH ALSO CONTAINS SOLUBILIZED SILICA WHEREIN THE SOLUBLIZED SILICA INTERFERES WITH THE RECOVERY OF THE DESIRED METAL VALUES, THE IMPROVEMENT COMPRISING PRECIPITATING SOLUBILIZED SILICA FROM THE AQUEOUS MEDIUM BY HEATING AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF A SOLUBLE SUBSTANCE YIELDING ALUMINUM ION IN SOLUTION, THE AQUEOUS MEDIUM HAVING A PH VALUE OF ABOUT 2.0-3.5 ADN THE RATIO BY WEIGHT OF ALUMINUM ION IN SOLUTION TO SOLUBILIZED SILICA WHEN CALCULATED AS AL/SIO2 BEING BETWEEN ABOUT 0.01:1 AND ABOUT 1.17:1, AND THEREAFTER RECOVERING THE DESIRED METAL VALUES.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-13 | 1969-03-15 | 1969-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-13 | 1973-03-15 | 1973-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-13 | 1977-03-15 | 1977-09-14 | $7700.00 | Window Closed / Lapsed |