Patent US3362531A successfully refreshed from Google Patents.
US3362531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating catalyst particles into fractions of differing surface area
Assignee: Sinclair Research Inc
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Filing: 1964-10-29
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Granted: 1968-01-09
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Expires: 1984-10-29
Abstract
No abstract record available.
Inventors
- 👤 Marvin F L Johnson
- 👤 Joseph E Willis
- 👤 Robert A Sanford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:02
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/009; B01J21/00; B01J21/12; B03; B03B; B03B1/00; B03B1/04; B03B5/00; B03B5/28; B03B5/30; B01J31/00; B01J31/02; B01J31/0272
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A METHOD FOR SEPARATING SILICA-BASED CRACKING CATALYST INTO FRACTIONS OF DIFFERING SURFACE AREA WHICH COMPRISES IMPREGNATING THE PARTICLES OF SAID CATALYST WITH A VOLATILE LIQUID, COATING SAID PARTICLES WITH A LIQUID MATERIAL COMPRISING A SOLVENT IMMISCIBLE WITH SAID VOLATILE LIQUID AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF ORGANOHALOSILANES HAVING 1-3 HALOGEN SUBSTITUENTS AND 1-3 HYDROCARBON SUBSTITUTENTS EACH OF 1-18 CARBON ATOMS, AND PETROLEUM DISTILLATE-SOLUBLE SILICONE RESINS DERIVED THEREFROM, REMOVING SAID VOLATILE LIQUID AND SAID SOLVENT AND SUBJECTING THE MASS OF PARTICLES TOI AN AQUEOUS SOLUTION OF AN INORGANIC SALT, THE AMOUNT OF SAID SELECTED LIQUID OF AN INORGANIC SALT, THE AMOUNT OF SAID SELECTED LIQUID MATERIAL AND THE DENSITY OF SAID AQUEOUS SOLUTION BEING SUFFICIENT TO EFFECT FLOTATION OF A FIRST FRACTION OF SAID CATALYST, SAID FIRST FRACTION HAVING AN AVERAGE SURFACE AREA AT LEAST ABOUT 5 SQUARE METERS PER GRAM GREATER THAN THE AVERAGE SURFACE AREA OF THE SECOND, NON-FLOATING FRACTION.
Claim 2
Independent Claim
154 words
A METHOD FOR SEPARATING SILICA-BASED CRACKING CATALYST INTO FRACTIONS OF DIFFERING SURFACE AREA WHICH COMPRISES IMPREGNATING THE PARTICLES OF SAID CATALYST WITH A VOLATILE LIQUID, COATING SAID PARTICLES WITH A LIQUID MATERIAL COMPRISING A SOLVENT IMMISCIBLE WITH SAID VOLATILE LIQUID AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF ORGANOHALOSILANES HAVING 1-3 HALOGEN SUBSTITUENTS AND 1-3 HYDROCARBON SUBSTITUTENTS EACH OF 1-18 CARBON ATOMS, AND PETROLEUM DISTILLATE-SOLUBLE SILICONE RESINS DERIVED THEREFROM, REMOVING SAID VOLATILE LIQUID AND SAID SOLVENT AND SUBJECTING THE MASS OF PARTICLES TOI AN AQUEOUS SOLUTION OF AN INORGANIC SALT, THE AMOUNT OF SAID SELECTED LIQUID OF AN INORGANIC SALT, THE AMOUNT OF SAID SELECTED LIQUID MATERIAL AND THE DENSITY OF SAID AQUEOUS SOLUTION BEING SUFFICIENT TO EFFECT FLOTATION OF A FIRST FRACTION OF SAID CATALYST, SAID FIRST FRACTION HAVING AN AVERAGE SURFACE AREA AT LEAST ABOUT 5 SQUARE METERS PER GRAM GREATER THAN THE AVERAGE SURFACE AREA OF THE SECOND, NON-FLOATING FRACTION.
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) | 1971-01-08 | 1971-07-10 | 1972-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-08 | 1975-07-10 | 1976-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-08 | 1979-07-10 | 1980-01-09 | $7700.00 | Window Closed / Lapsed |