US3223482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 02:05
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.
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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) | 1968-12-13 | 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 |