Patent US3029151A successfully refreshed from Google Patents.
US3029151A
Expired / Lapsed
US
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Method for producing concentrated small particle size silica sols
Assignee: ChampionX LLC
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Filing: 1958-12-08
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Granted: 1962-04-10
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Expires: 1978-12-08
Abstract
No abstract record available.
Inventors
- 👤 Reuter Raymond
- 👤 Lewis E Reven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:43
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/14; C01B33/146; C01B33/151; C04; C04B; C04B12/00; C04B12/04; Y; Y10; Y10S; Y10S516/00; Y10S516/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE PROCESS OF MAKING A CONCENTRATED AQUEOUS COLLOIDAL SILICA SOL, HAVING AN AVERAGE PARTICLE SIZE WITHIN THE RANGE OF 6 TO 10 MILLIMICRONS AND A CONDUCTIVITY OF AT LEAST 700 MICROMHOS WHICH COMPRISES ADJUSTING THE PH OF AN SCIDIC SOL HAVING AN AVERAGE PARTICLE METAL BASE, SAID ACIDIC SOL HAVING AN AVERAGE PARTICLE SIZE NO GREATER THAN 4 MILLIMICRONS AND A SILICA CONCENTRATION OF FROM 2% TO 6% BY WEIGHT , HEATING THE ALKALI TREATED SOL TO BETWEEN 9/*F. AND 200*F., UNDER CONDITIONS WHEREBY SUBSTANTIALLY NO WATER IS LOST BY EVAPORATION, AND DURING THE HEATING STEP MAINTAINING THE PH BETWEEN 8.3 AND 8.8 BY ADDITION OF SAID ACIDIC SOL UNTIL THE PH REACHES AN EQUILIBRIUM BETWEEN 8.3 AND 8.8 AND THEN CONCENTRATING THE RESULTANT SOL TO A SILICA CONCENTRATION BETWEEN 12% AND 28% BY WEIGHT.
Claim 2
Dependent Claim
135 words
THE PROCESS OF MAKING A CONCENTRATED AQUEOUS COLLOIDAL SILICA SOL, HAVING AN AVERAGE PARTICLE SIZE WITHIN THE RANGE OF 6 TO 10 MILLIMICRONS AND A CONDUCTIVITY OF AT LEAST 700 MICROMHOS WHICH COMPRISES ADJUSTING THE PH OF AN SCIDIC SOL HAVING AN AVERAGE PARTICLE METAL BASE, SAID ACIDIC SOL HAVING AN AVERAGE PARTICLE SIZE NO GREATER THAN 4 MILLIMICRONS AND A SILICA CONCENTRATION OF FROM 2% TO 6% BY WEIGHT , HEATING THE ALKALI TREATED SOL TO BETWEEN 9/*F. AND 200*F., UNDER CONDITIONS WHEREBY SUBSTANTIALLY NO WATER IS LOST BY EVAPORATION, AND DURING THE HEATING STEP MAINTAINING THE PH BETWEEN 8.3 AND 8.8 BY ADDITION OF SAID ACIDIC SOL UNTIL THE PH REACHES AN EQUILIBRIUM BETWEEN 8.3 AND 8.8 AND THEN CONCENTRATING THE RESULTANT SOL TO A SILICA CONCENTRATION BETWEEN 12% AND 28% BY WEIGHT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-09 | 1965-10-09 | 1966-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-09 | 1969-10-09 | 1970-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-09 | 1973-10-09 | 1974-04-10 | $7700.00 | Window Closed / Lapsed |