US2974108A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminosilicate aquasols and their preparation
Assignee: EIDP Inc
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Filing: 1957-01-14
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Granted: 1961-03-07
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Expires: 1977-01-14
Abstract
No abstract record available.
Inventors
- 👤 Guy B Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:37
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0008; B01J13/0013
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
163 words
AN AQUASOL HAVING A PH OF ABOUT 4 TO 10, THE SOL CONSISTING ESSENTIALLY OF (A) WATER AS THE CONTINUOUS PHASE, AND (B) A DISPERSED SOLID PHASE OF NEGATIVELY CHARGED PARTICLES, THE SOLID IN SAID PARTICLES CONSISTING THROUGH OF AN ALUMINOSILICATE HAVING THE EMPIRICAL FORMULA MALO2.XAL2O3.YSIO2, WHERE X RANGES FROM 0 TO 25, Y RANGES FROM 1 TO 200, AND M IS A MOLOVALENT CATION SELECTED FROM THE GROUP CONSISTING OF ELEMENTS OF GROUP 1A OF THE PERIODIC TABLE, AMMONIUM, AND SUBSTITUTED AMMONIUM IONS, AND THE SI:AL MOL RATIO IS FROM 1:1 TO 50:1, SAID PARTICLES BEING AMORPHOUS, SUBSTANTIALLY SPHEROIDAL IN SHAPE, AND RANGING IN SIZE FROM 3 TO 150 MILLIMICRONS IN DIAMETER, AND BEING PRESENT IN A CONCENTRATION OF FROM 3 TO 70% BY WEIGHT IN THE SOL, THE SOLUBLE SALT CONTENT OF THE AQUASOL BEING NOT SUBSTANTIALLY GREATER THAN 0.05 NORMAL, AND THE AQUASOL BEING STABLE AGAINST ANY SUBSTANTIAL INCREASE IN VISCOSITY WHEN STORED AT 20 TO 35*C. FOR SIX MONTHS.
Claim 2
Dependent Claim
163 words
AN AQUASOL HAVING A PH OF ABOUT 4 TO 10, THE SOL CONSISTING ESSENTIALLY OF (A) WATER AS THE CONTINUOUS PHASE, AND (B) A DISPERSED SOLID PHASE OF NEGATIVELY CHARGED PARTICLES, THE SOLID IN SAID PARTICLES CONSISTING THROUGH OF AN ALUMINOSILICATE HAVING THE EMPIRICAL FORMULA MALO2.XAL2O3.YSIO2, WHERE X RANGES FROM 0 TO 25, Y RANGES FROM 1 TO 200, AND M IS A MOLOVALENT CATION SELECTED FROM THE GROUP CONSISTING OF ELEMENTS OF GROUP 1A OF THE PERIODIC TABLE, AMMONIUM, AND SUBSTITUTED AMMONIUM IONS, AND THE SI:AL MOL RATIO IS FROM 1:1 TO 50:1, SAID PARTICLES BEING AMORPHOUS, SUBSTANTIALLY SPHEROIDAL IN SHAPE, AND RANGING IN SIZE FROM 3 TO 150 MILLIMICRONS IN DIAMETER, AND BEING PRESENT IN A CONCENTRATION OF FROM 3 TO 70% BY WEIGHT IN THE SOL, THE SOLUBLE SALT CONTENT OF THE AQUASOL BEING NOT SUBSTANTIALLY GREATER THAN 0.05 NORMAL, AND THE AQUASOL BEING STABLE AGAINST ANY SUBSTANTIAL INCREASE IN VISCOSITY WHEN STORED AT 20 TO 35*C. FOR SIX MONTHS.
Claim 3
Dependent Claim
153 words
IN A PROCESS FOR PRODUCING AN ALUMINOSILICATE AQUASOL WHICH IS STABLE AGAINST ANY SUBSTANTIAL INCREASE IN VISCOSITY WHEN STORED AT 20 TO 35*C. FOR SIX MONTHS THE STEP COMPRISING ADDING SIMULTANEOUSLY, BUT AS SEPARATE SOLUTIONS, AN AQUEOUS SOLUTION CONTAINING ABOUT FROM 1 TO 3% BY WEIGHT CALCULATED AS SIO2, OF ACTIVE SILICA AND AN AQUEOUS SOLUTION OF AN ALKALI METAL ALUMINATE TO A VIGOROUSLY AGITATED BODY OF WATER HAVING DISSOLVED THEREIN AN AMOUNT OF ALKALI SUFFICIENT TO MAINTAIN THE PH IN THE RANGE OF FROM 8 TO 12, INITIALLY, AND THE PROPORTIONS OF SAID ACTIVE SILICA AND ALUMINATE SOLUTIONS ADDED BEING SUCH AS TO MAINTAIN THE PH IN THE RANGE OF ABOUT 9 TO 12 DURING SAID ADDITIONS, AND THE SOLUBLE SALT CONTENTS TO THE AGITATED MIXTURE AND OF THE SOLUTIONS ADDED THERETO BEING LOW ENOUGH THAT THE CONCENTRATION OF SALT IN THE ALUMINOSILICATE SOL FORMED IS NOT SUBSTANTIALLY GREATER THAN 0.05 NORMAL.
Claim 4
Dependent Claim
153 words
IN A PROCESS FOR PRODUCING AN ALUMINOSILICATE AQUASOL WHICH IS STABLE AGAINST ANY SUBSTANTIAL INCREASE IN VISCOSITY WHEN STORED AT 20 TO 35*C. FOR SIX MONTHS THE STEP COMPRISING ADDING SIMULTANEOUSLY, BUT AS SEPARATE SOLUTIONS, AN AQUEOUS SOLUTION CONTAINING ABOUT FROM 1 TO 3% BY WEIGHT CALCULATED AS SIO2, OF ACTIVE SILICA AND AN AQUEOUS SOLUTION OF AN ALKALI METAL ALUMINATE TO A VIGOROUSLY AGITATED BODY OF WATER HAVING DISSOLVED THEREIN AN AMOUNT OF ALKALI SUFFICIENT TO MAINTAIN THE PH IN THE RANGE OF FROM 8 TO 12, INITIALLY, AND THE PROPORTIONS OF SAID ACTIVE SILICA AND ALUMINATE SOLUTIONS ADDED BEING SUCH AS TO MAINTAIN THE PH IN THE RANGE OF ABOUT 9 TO 12 DURING SAID ADDITIONS, AND THE SOLUBLE SALT CONTENTS TO THE AGITATED MIXTURE AND OF THE SOLUTIONS ADDED THERETO BEING LOW ENOUGH THAT THE CONCENTRATION OF SALT IN THE ALUMINOSILICATE SOL FORMED IS NOT SUBSTANTIALLY GREATER THAN 0.05 NORMAL.
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) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |