US2654696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of lubricating oil
Assignee: Sunoco Inc
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Filing: 1950-06-02
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Granted: 1953-10-06
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Expires: 1970-06-02
Abstract
No abstract record available.
Inventors
- 👤 Porte Walter N La
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:01
CPC Classifications
C; C07; C07C; C07C67/00; C10; C10G; C10G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
PROCESS FOR IMPROVING THE COLOR OF DISTILLATE LUBRICATING OIL WITHOUT SUBSTANTIAL HYDROGENATION OF UNSATURATED HYDROCARBONS IN SAID OIL WHICH COMPRISES: PASSING SAID OIL DOWNWARDLY AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE FROM 450* F. TO 575* F. THROUGH A BED OF 4-20 MESH HYDROGEN-TREATING CATALYST IN THE PRESENCE OF HYDROGEN AT A PRESSURE WITHIN THE RANGE FROM 10 TO 35 ATMOSPHERES AND AT A SPACE RATE WITHIN THE RANGE FROM 1 TO 5 VOLUMES OF OIL PER VOLUME OF CATALYST PER HOUR AND AT A FLOW RATE WITHIN THE RANGE FROM 10 TO 160 CUBIC FEET OF OIL PER SQUARE FOOT OF CTALYST BED CROSS-SECTION PER HOUR, THEREBY TO MAINTAIN A RELATIVELY THICK LIQUID FILM OF OIL ON THE CATALYST; AND RECOVERING FROM SAID BED A LUBRICATING OIL HAVING REFRACTION INDEX WITHIN 0.001 OF THE REFRACTIVE INDEX OF THE CHARGE OIL, AND HAVING COLOR SUBSTANTIALLY IMPROVED ORDER THAT OF THE CHARGE OIL.
Claim 2
Dependent Claim
152 words
PROCESS FOR IMPROVING THE COLOR OF DISTILLATE LUBRICATING OIL WITHOUT SUBSTANTIAL HYDROGENATION OF UNSATURATED HYDROCARBONS IN SAID OIL WHICH COMPRISES: PASSING SAID OIL DOWNWARDLY AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE FROM 450* F. TO 575* F. THROUGH A BED OF 4-20 MESH HYDROGEN-TREATING CATALYST IN THE PRESENCE OF HYDROGEN AT A PRESSURE WITHIN THE RANGE FROM 10 TO 35 ATMOSPHERES AND AT A SPACE RATE WITHIN THE RANGE FROM 1 TO 5 VOLUMES OF OIL PER VOLUME OF CATALYST PER HOUR AND AT A FLOW RATE WITHIN THE RANGE FROM 10 TO 160 CUBIC FEET OF OIL PER SQUARE FOOT OF CTALYST BED CROSS-SECTION PER HOUR, THEREBY TO MAINTAIN A RELATIVELY THICK LIQUID FILM OF OIL ON THE CATALYST; AND RECOVERING FROM SAID BED A LUBRICATING OIL HAVING REFRACTION INDEX WITHIN 0.001 OF THE REFRACTIVE INDEX OF THE CHARGE OIL, AND HAVING COLOR SUBSTANTIALLY IMPROVED ORDER THAT OF THE CHARGE OIL.
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) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |