Patent US2731397A successfully refreshed from Google Patents.
US2731397A
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Conversion of hydrocarbon oils with the use of a silica-magnesia cracking catalyst incorporated with a small amount of strontium
Assignee: Sinclair Refining Co
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Filing: 1950-06-14
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Granted: 1956-01-17
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Expires: 1970-06-14
Abstract
No abstract record available.
Inventors
- 👤 Erickson Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
IN THE CONVERSION OF HYDROCARBON OILS AT A CRACKING TEMPERATURE IN THE PRESENCE OF A CRACKING CATALYST WHICH IS CYCLICALLY REGENERATED BY COMBUSTION OF ADHERENT CARBONACEOUS MATTER WITH AN OXYGEN-CONTAINING GAS, THE IMPROVEMENT WHICH CONSISTS OF CONTACTING THE HYDROCARBON OIL WITH A SILICA-MAGNESIA CRACKING CATALYST WHICH HAS BEEN MODIFIED BY THE INCORPORATION OF A SMALL PROPORTION OF STRONTIUM IN AN AMOUNT OF 0.1% TO 2% BASED ON THE WEIGHT OF THE CATALYST.
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) | 1959-01-16 | 1959-07-18 | 1960-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-16 | 1963-07-18 | 1964-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-16 | 1967-07-18 | 1968-01-17 | $7700.00 | Window Closed / Lapsed |