Patent US2827421A successfully refreshed from Google Patents.
US2827421A
Expired / Lapsed
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Treatment of silica-alumina beads with ammonium fluoride
Assignee: Sinclair Refining Co
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Filing: 1950-10-05
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Granted: 1958-03-18
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Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:07
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; B; B01; B01J; B01J21/00; B01J21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN THE CONVERSION OF HYDROCARBON OIL STOCKS IN THE PRESENCE OF A PARTICLE FORM CRACKING CATALYST AT A CRACKING TEMPERATURE IN WHICH THE CATALYST IS CYCLICALLY REGENERAATED BY BURNING OFF CARBONACEOUS MATTER DEPOSITED IN THE CONVERSION REACTION WITH AN OXYGEN-CONTAINING GAS, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE HYDROCARBON STOCK WITH A SILICA-ALUMINA CATALYST WHICH HAS BEEN REDUCED IN APPARENT DENSITY BY ABOUT 10 TO 30 PERCENT AND INCREASED CORRESPONDINGLY IN POROSITY BY TREATMENT WHILE IN THE HYDROGEL STATE WITH DILUTE AQUEOUS AMMONIUM FLUORIDE AND CALCINATION OF THE UNWASHED AMMONIUM FLUORIDE TREATED CATALYST.
Claim 2
Dependent Claim
92 words
IN THE CONVERSION OF HYDROCARBON OIL STOCKS IN THE PRESENCE OF A PARTICLE FORM CRACKING CATALYST AT A CRACKING TEMPERATURE IN WHICH THE CATALYST IS CYCLICALLY REGENERAATED BY BURNING OFF CARBONACEOUS MATTER DEPOSITED IN THE CONVERSION REACTION WITH AN OXYGEN-CONTAINING GAS, THE IMPROVEMENT WHICH COMPRISES CONTACTING THE HYDROCARBON STOCK WITH A SILICA-ALUMINA CATALYST WHICH HAS BEEN REDUCED IN APPARENT DENSITY BY ABOUT 10 TO 30 PERCENT AND INCREASED CORRESPONDINGLY IN POROSITY BY TREATMENT WHILE IN THE HYDROGEL STATE WITH DILUTE AQUEOUS AMMONIUM FLUORIDE AND CALCINATION OF THE UNWASHED AMMONIUM FLUORIDE TREATED CATALYST.
References Cited (Backward Citations)
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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) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |