US3228875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of lubricating oils
Assignee: BP PLC
•
Filing: 1962-03-19
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Granted: 1966-01-11
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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
2026-11-07 12:32
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
100 words
A PROCESS FOR REFINING A LUBRICATING OIL TO IMPART IMPROVED COLOR AND OXIDATION STABILITY PROPERTIES THERETO WHICH COMPRISES CONTACTING THE OIL WITH HYDROGEN AT A TEMPERATURE WITHIN THE RANGE 150-340*C. A PRESSURE WITHIN THE RANGE 5-80 ATMOSPHERES, AND IN THE PRESENCE OF A CATALYST CONSISTING OF THE OXIDES OF COBALT AND MOLYBDENUM INCORPORATED WITH A SUPPORT CONSISTING OF A BAUXITE HAVING, AS A NATURALLY OCCURRING COMPONENT THEREOF, AT LEAST 10% BY WEIGHT OF IRON OXIDE; SAID BAUXITE, BEFORE USE, BEING CALCINED AT A TEMPERATURE ABOUE 600* C. BUT BELOW 900*C., BEFORE THE OXIDES OF COBALT AND MOLYBDENUM ARE INCORPORATED THEREWITH.
Claim 2
Dependent Claim
100 words
A PROCESS FOR REFINING A LUBRICATING OIL TO IMPART IMPROVED COLOR AND OXIDATION STABILITY PROPERTIES THERETO WHICH COMPRISES CONTACTING THE OIL WITH HYDROGEN AT A TEMPERATURE WITHIN THE RANGE 150-340*C. A PRESSURE WITHIN THE RANGE 5-80 ATMOSPHERES, AND IN THE PRESENCE OF A CATALYST CONSISTING OF THE OXIDES OF COBALT AND MOLYBDENUM INCORPORATED WITH A SUPPORT CONSISTING OF A BAUXITE HAVING, AS A NATURALLY OCCURRING COMPONENT THEREOF, AT LEAST 10% BY WEIGHT OF IRON OXIDE; SAID BAUXITE, BEFORE USE, BEING CALCINED AT A TEMPERATURE ABOUE 600* C. BUT BELOW 900*C., BEFORE THE OXIDES OF COBALT AND MOLYBDENUM ARE INCORPORATED THEREWITH.
References Cited (Backward Citations)
US2921025A
Cited
US3020228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |