Patent US2650188A successfully refreshed from Google Patents.
US2650188A
Expired / Lapsed
US
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Preparation of lubricating oil
Assignee: Sunoco Inc
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Filing: 1949-11-01
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Granted: 1953-08-25
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Expires: 1969-11-01
Abstract
No abstract record available.
Inventors
- 👤 George E Reese
- 👤 John L Larkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:50
CPC Classifications
C; C10; C10G; C10G7/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR PREPARING LUBRICATING OIL FROM NAPHTHENIC BASE CRUDE PETROLEUM WHEREIN HYDROCARBONS BOILING BELOW THE LUBRICATING OIL RANGE ARE REMOVED AS DISTILLATE IN A PRIMARY DISTILLATION STEP AND LUBRICATING OIL IS REMOVED AS DISTILLATE IN A SUBSEQUENT VACUUM DISTILLATION STEP, TTHE STEPS FOR PRODUCING LUBRICATING OIL HAVING IMPROVED BLOOM AND COLOR STABILITY CHARACTERISTICS WHICH CONSIST OF REACTING THE CHARGE TO ONE OF SAID DISTILLATION STEPS WITH AMMONIA IN THE PRESENCE OF CAUSTIC SODA, SAID AMMONIA AND CAUSTIC SODA HAVING BEEN ADDED IN AMOUNTS OF AT LEAST 1.2 LBS.NAOH AND 0.1 LB. NH3, RESPECTIVELY PER BBL. OF MAZOUT RESULTING FROM SAID DISTILLATION STEP.
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR PREPARING LUBRICATING OIL FROM NAPHTHENIC BASE CRUDE PETROLEUM WHEREIN HYDROCARBONS BOILING BELOW THE LUBRICATING OIL RANGE ARE REMOVED AS DISTILLATE IN A PRIMARY DISTILLATION STEP AND LUBRICATING OIL IS REMOVED AS DISTILLATE IN A SUBSEQUENT VACUUM DISTILLATION STEP, TTHE STEPS FOR PRODUCING LUBRICATING OIL HAVING IMPROVED BLOOM AND COLOR STABILITY CHARACTERISTICS WHICH CONSIST OF REACTING THE CHARGE TO ONE OF SAID DISTILLATION STEPS WITH AMMONIA IN THE PRESENCE OF CAUSTIC SODA, SAID AMMONIA AND CAUSTIC SODA HAVING BEEN ADDED IN AMOUNTS OF AT LEAST 1.2 LBS.NAOH AND 0.1 LB. NH3, RESPECTIVELY PER BBL. OF MAZOUT RESULTING FROM SAID DISTILLATION STEP.
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |