Patent US2650187A successfully refreshed from Google Patents.
US2650187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color stabilization of fuel oils
Assignee: ExxonMobil Oil Corp
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Filing: 1950-11-15
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Granted: 1953-08-25
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Expires: 1970-11-15
Abstract
No abstract record available.
Inventors
- 👤 Earl C Daigle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:25
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A METHOD FOR REDUCING SEDIMENTATION AND STABILIZING THE COLOR OF A DISTILLATE TYPE FUEL OIL BOILING BETWEEN ABOUT 300* F. AND ABOUT 700* F. AND SUBJECT TO SEDIMENT FORMATION AND DISCOLORATION UPON STORAGE, WHICH COMPRISES LIQUID PHASE CONTACTING OF SAID OIL WITH A POLYETHYLENE GLYCOL CHARACTERIZED BY A MOLECULAR WEIGHT OF AT LEAST ABOUT 600 AND SUBSTANTIALLY COMPLETE SOLUBILITY IN WATER, THE AMOUNT OF SAID POLYETHYLENE GLYCOL PRESENT BEING NOT LESS THAN ABOUT 2 PER CENT AND NOT MORE THAN ABOUT 25 PER CENT BY WEIGHT OF THE OIL, FORMING IMMISCIBLE PHASES COMPRISING AN OIL LAYER MIXED WITH A SMALL AMOUNT OF SAID POLYETHYLENE GLYCOL AND A SECOND LAYER COMPRISING THE BULK OF SAID POLYETHYLENE GLYCOL TOGETHER WITH DELETERIOUS MATTER REMOVED FROM SAID OIL, SEPARATING SAID IMMISCIBLE PHASE AND RECOVERING OIL OF IMPROVED SEDIMENTATION AND COLOR STABILITY FROM SAID OIL LAYER.
Claim 2
Independent Claim
141 words
A METHOD FOR REDUCING SEDIMENTATION AND STABILIZING THE COLOR OF A DISTILLATE TYPE FUEL OIL BOILING BETWEEN ABOUT 300* F. AND ABOUT 700* F. AND SUBJECT TO SEDIMENT FORMATION AND DISCOLORATION UPON STORAGE, WHICH COMPRISES LIQUID PHASE CONTACTING OF SAID OIL WITH A POLYETHYLENE GLYCOL CHARACTERIZED BY A MOLECULAR WEIGHT OF AT LEAST ABOUT 600 AND SUBSTANTIALLY COMPLETE SOLUBILITY IN WATER, THE AMOUNT OF SAID POLYETHYLENE GLYCOL PRESENT BEING NOT LESS THAN ABOUT 2 PER CENT AND NOT MORE THAN ABOUT 25 PER CENT BY WEIGHT OF THE OIL, FORMING IMMISCIBLE PHASES COMPRISING AN OIL LAYER MIXED WITH A SMALL AMOUNT OF SAID POLYETHYLENE GLYCOL AND A SECOND LAYER COMPRISING THE BULK OF SAID POLYETHYLENE GLYCOL TOGETHER WITH DELETERIOUS MATTER REMOVED FROM SAID OIL, SEPARATING SAID IMMISCIBLE PHASE AND RECOVERING OIL OF IMPROVED SEDIMENTATION AND COLOR STABILITY FROM SAID OIL LAYER.
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) | 1956-08-24 | 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 |