US3124540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
wilson
Assignee: —
•
Filing: —
•
Granted: 1964-03-10
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:17
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; B01J27/12; B01J21/00; B01J21/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A PROCESS FOR PREPARING A SILICA-MAGNESIA-FLUORINE HYDROCARBON CRACKING CATALYST CONTAINING ABOUT 0.5 TO 5% FLUORINE WHICH COMPRISES ACIDIFYING A DILUTE SODIUM SILICATE SOLUTION WITH SULFURIC ACID IN AN AMOUNT SUFFICIENT TO CAUSE GELATION OF THE SILICA, ADDING SUFFICIENT SULFURIC ACID TO NEUTRALIZE 80-90% OF THE ALKALI ORIGINALLY PRESENT IN THE SODIUM SILICATE, ADDING A SUSPENSION OF HYDRATED CALCINED MAGNESIA TO THE RESULTING HYDROGEL, AGING SAID SLURRY AT A TEMPERATURE OF ABOUT 180*F. FOR A PERIOD OF ABOUT 2-3 HOURS, RECOVERING THE RESULTING SILICA MAGNESIA COMPLEX THEREFROM, DISPERSING ON SAID COMPLEX AN AQUEOUS SLURRY CONTAINING FREE MAGNESIUM IONS, RESLURRYING THE RESULTING MASS WITH A SOLUTION CONTAINING DISSOLVED FLUORINE IN AN AMOUNT SUFFICIENT TO IMPREGNATE SAID SILICA MAGNESIA COMPLEX WITH FROM 0.5 TO 5 WEIGHT PERCENT RESIDUAL FLUORINE AND DRYING, WASHING AND REDRYING THE RESULTING COMPOSITE.
Claim 2
Dependent Claim
134 words
A PROCESS FOR PREPARING A SILICA-MAGNESIA-FLUORINE HYDROCARBON CRACKING CATALYST CONTAINING ABOUT 0.5 TO 5% FLUORINE WHICH COMPRISES ACIDIFYING A DILUTE SODIUM SILICATE SOLUTION WITH SULFURIC ACID IN AN AMOUNT SUFFICIENT TO CAUSE GELATION OF THE SILICA, ADDING SUFFICIENT SULFURIC ACID TO NEUTRALIZE 80-90% OF THE ALKALI ORIGINALLY PRESENT IN THE SODIUM SILICATE, ADDING A SUSPENSION OF HYDRATED CALCINED MAGNESIA TO THE RESULTING HYDROGEL, AGING SAID SLURRY AT A TEMPERATURE OF ABOUT 180*F. FOR A PERIOD OF ABOUT 2-3 HOURS, RECOVERING THE RESULTING SILICA MAGNESIA COMPLEX THEREFROM, DISPERSING ON SAID COMPLEX AN AQUEOUS SLURRY CONTAINING FREE MAGNESIUM IONS, RESLURRYING THE RESULTING MASS WITH A SOLUTION CONTAINING DISSOLVED FLUORINE IN AN AMOUNT SUFFICIENT TO IMPREGNATE SAID SILICA MAGNESIA COMPLEX WITH FROM 0.5 TO 5 WEIGHT PERCENT RESIDUAL FLUORINE AND DRYING, WASHING AND REDRYING THE RESULTING COMPOSITE.
References Cited (Backward Citations)
US2901440A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-10 | 1967-09-09 | 1968-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-10 | 1971-09-09 | 1972-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-10 | 1975-09-09 | 1976-03-10 | $7700.00 | Window Closed / Lapsed |