Patent US3223482A successfully refreshed from Google Patents.
US3223482A
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Process for producing readily dispersible sio2 and al2o3 solids
Assignee: National Research Council Canada
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Filing: 1964-08-12
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Granted: 1965-12-14
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Expires: 1984-08-12
Abstract
No abstract record available.
Inventors
- 👤 Ira E Puddington
- 👤 Aurelio F Sirianni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:22
CPC Classifications
B; B82; B82Y; B82Y30/00; B01; B01J; B01J2/00; B01J2/30; C; C01; C01B; C01B33/00; C01B33/113; C01B33/12; C01B33/18; C08; C08K; C08K9/00; C08K9/04; C08K9/08; C09; C09C; C09C1/00; C09C1/28; C09C1/30; C09C1/309; C09C1/40; C09C1/407; C09C3/00; C09C3/006; C09C3/04; C09C3/043; C09C3/06; C09C3/063; C09C3/08; C09C3/10; C10; C10M; C10M5/00; C01P; C01P2002/00; C01P2002/02; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/50; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/10; C01P2006/11; C01P2006/20; C01P2006/22; C10M2201/00; C10M2201/06; C10M2201/061; C10M2201/14; C10M2201/16; C10M2201/18; C10M2203/00; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/022; C10M2207/10; C10M2207/18; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/289; C10M2207/34; C10M2207/40; C10M2207/404; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/10; C10M2215/102; C10M2219/00; C10M2219/04; C10M2219/044; C10M2223/00; C10M2223/10; C10N; C10N2050/00; C10N2050/015; C10N2050/02; C10N2050/10; C10N2060/00; C10N2060/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A METHOD OF PRODUCING FINELY DIVIDED DISCRETE SOLIDS WHICH COMPRISES THE STEPS OF (1) ADMIXING WITH A SUBSTANTIALLY SALT-FREE AQUEOUS DISPERSION OF COLLOIDAL PARTICLES SELECTED FROM THE GROUP CONSISTING OF SILICA AND ALUMINA, AT LEAST ABOUT 50%, BY WEIGHT, OF A CONDITIONING AGENT SELECTED FROM A GROUP CONSISTING OF THE AMMONIUM AND AMINE ALCOHOL SALTS AND THE SORBITAN AND POLYOXYETHYLENE SORBITAN ESTERS OF ALIPHATIC AND CYCLOALIPHATIC CARBOXYLIC ACIDS CONTAINING FROM 8 TO 22 CARBON ATOMS, THE UREA COMPLEXES OF SAID ACIDS HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 2000, AND ALKYL PHENOL-POLYOXYETHYLENE ETHER ADDUCTS HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 800 TO ABOUT 2000, SAID CONDITIONING AGENT HAVING A VOLATILIZATION TEMPERATURE ABOVE ABOUT 100*C., (2) AGITATING SAID MIXTURE SUFFICIENTLY TO FORM A COATING OF SAID CONDITIONING AGENT ON SAID PARTICLES, (3) REMOVING THE WATER FROM SAID MIXTURE TO FORM A SUBSTANTIALLY WATER-FREE MASS OF CONDITIONING AGENT-COATED PARTICLES, AND (4) HEATING SAID WATER-FREE MASS AT A TEMPERATURE IN THE RANGE OF ABOUT 350*C. TO ABOUT 700*C. UNTIL SAID COATING IS SUBSTANTALLY COMPLETELY BURNED FROM THE SURFACE OF SAID PARTICLES.
Claim 2
Independent Claim
181 words
A METHOD OF PRODUCING FINELY DIVIDED DISCRETE SOLIDS WHICH COMPRISES THE STEPS OF (1) ADMIXING WITH A SUBSTANTIALLY SALT-FREE AQUEOUS DISPERSION OF COLLOIDAL PARTICLES SELECTED FROM THE GROUP CONSISTING OF SILICA AND ALUMINA, AT LEAST ABOUT 50%, BY WEIGHT, OF A CONDITIONING AGENT SELECTED FROM A GROUP CONSISTING OF THE AMMONIUM AND AMINE ALCOHOL SALTS AND THE SORBITAN AND POLYOXYETHYLENE SORBITAN ESTERS OF ALIPHATIC AND CYCLOALIPHATIC CARBOXYLIC ACIDS CONTAINING FROM 8 TO 22 CARBON ATOMS, THE UREA COMPLEXES OF SAID ACIDS HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 2000, AND ALKYL PHENOL-POLYOXYETHYLENE ETHER ADDUCTS HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 800 TO ABOUT 2000, SAID CONDITIONING AGENT HAVING A VOLATILIZATION TEMPERATURE ABOVE ABOUT 100*C., (2) AGITATING SAID MIXTURE SUFFICIENTLY TO FORM A COATING OF SAID CONDITIONING AGENT ON SAID PARTICLES, (3) REMOVING THE WATER FROM SAID MIXTURE TO FORM A SUBSTANTIALLY WATER-FREE MASS OF CONDITIONING AGENT-COATED PARTICLES, AND (4) HEATING SAID WATER-FREE MASS AT A TEMPERATURE IN THE RANGE OF ABOUT 350*C. TO ABOUT 700*C. UNTIL SAID COATING IS SUBSTANTALLY COMPLETELY BURNED FROM THE SURFACE OF SAID PARTICLES.
References Cited (Backward Citations)
US993913A
Cited
US2894851A
Cited
US2835606A
Cited
US2924510A
Cited
US3041140A
Cited
US3148026A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |