Patent US3218251A successfully refreshed from Google Patents.
US3218251A
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Refining of lubricating oils
Assignee: BP PLC
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Filing: 1962-03-19
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Granted: 1965-11-16
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Demeester Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/882; C; C10; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS OF PRODUCING LUBRICATING OILS HAVING IMPROVED COLOR AND OXIDATION STABILITY WHICH COMPRISES TREATING THE OILS WITH HYDROGEN AT A TEMPERATURE WITHIN THE RANGE 150 TO 340*C. AND AT A PRESSURE WITHIN THE RANGE 5 TO 80 ATMOSPHERES IN THE PRESENCE OF A CATALYST CONSISTING OF COBALT OXIDE AND MOLYBDENUM OXIDE INCORPORATED WITH A SUPPORT CONSISTING ESSENTIALLY OF A MIXTURE OF IRON OXIDE AND MAGNESIUM OXIDE, SAID SUPPORT MIXTURE HAVING BEEN PREPARED BY COPRECIPITATION AND CONTAINING IRON OIXDE IN THE RANGE 25-45% BY WEIGHT OF TOTAL CATALYST, THE RATIO OF MAGNESIUM OXIDE TO IRON OXIDE BY WEIGHT BEING AT LEAST 1:1.
Claim 2
Dependent Claim
102 words
A PROCESS OF PRODUCING LUBRICATING OILS HAVING IMPROVED COLOR AND OXIDATION STABILITY WHICH COMPRISES TREATING THE OILS WITH HYDROGEN AT A TEMPERATURE WITHIN THE RANGE 150 TO 340*C. AND AT A PRESSURE WITHIN THE RANGE 5 TO 80 ATMOSPHERES IN THE PRESENCE OF A CATALYST CONSISTING OF COBALT OXIDE AND MOLYBDENUM OXIDE INCORPORATED WITH A SUPPORT CONSISTING ESSENTIALLY OF A MIXTURE OF IRON OXIDE AND MAGNESIUM OXIDE, SAID SUPPORT MIXTURE HAVING BEEN PREPARED BY COPRECIPITATION AND CONTAINING IRON OIXDE IN THE RANGE 25-45% BY WEIGHT OF TOTAL CATALYST, THE RATIO OF MAGNESIUM OXIDE TO IRON OXIDE BY WEIGHT BEING AT LEAST 1:1.
References Cited (Backward Citations)
US2706167A
Cited
US3020228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |