US2959539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced alkali-acid stabilization of fuel oils
Assignee: ExxonMobil Oil Corp
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Filing: 1956-06-25
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Granted: 1960-11-08
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Expires: 1976-06-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Claiborne A Duval
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:33
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN THE METHOD OF TREATING FUEL FRACTIONS OF PETROLEUM OIL BOILING ABOVE THE GASOLINE RANGE WHICH ARE UNSTABLE TO AT LEAST ONE OF COLOR AND SEDIMENT WHICH CONSISTS ESSENTIALLY OF CONTACTING A FUEL FRACTION OF PETROLEUM OIL BOILING ABOVE THE GASOLINE RANGE WITH AN AQUEOUS ALKALI METAL HYDROXIDE TREATING SOLUTION HAVING A DENSITY OF AT LEAST 40* BAUME AND WITH AN OIL-TO-TREATING-SOLUTION RATIO OF ABOUT 4:1 TO 30:1, TO OBTAIN A PARTIALLY TREATED OIL AND ALKALI METAL SALTS OF ORGANIC CONSTITUENTS OF SAID PETROLEUM FRACTION HAVING REPLACEMENT ACIDIC HYDROGEN ATOMS, SEPARATING PARTIALLY TREATED OIL FROM THE AFORESAID ALKALI METAL ORGANIC SALTS AND AQUEOUS ALKALI METAL HYDROXIDE, SEPARATING SAID ALKALI METAL ORGANIC SALTS FROM AQUEOUS ALKALI METAL HYDROXIDE, IMMEDIATELY CONTACTING SAID PARTIALLY TREATED OIL WITH A SOLUTION CONTAINING AT LEAST 90 WEIGHT PERCENT SULFURIC ACID TO OBTAIN TWICETREATED PETROLEUM FRACTION AND ACID SLUDGE, SEPARATING TWICE-TREATED PETROLEUM FRACTION FROM ACID SLUDGE, IMMEDIATELY CONTACTING TWICE-TREATED PETROLEUM FRACTION WITH SUFFICIENT AQUEOUS ALKALI METAL HYDROXIDE TO PRODUCE
Claim 2
Dependent Claim
162 words
IN THE METHOD OF TREATING FUEL FRACTIONS OF PETROLEUM OIL BOILING ABOVE THE GASOLINE RANGE WHICH ARE UNSTABLE TO AT LEAST ONE OF COLOR AND SEDIMENT WHICH CONSISTS ESSENTIALLY OF CONTACTING A FUEL FRACTION OF PETROLEUM OIL BOILING ABOVE THE GASOLINE RANGE WITH AN AQUEOUS ALKALI METAL HYDROXIDE TREATING SOLUTION HAVING A DENSITY OF AT LEAST 40* BAUME AND WITH AN OIL-TO-TREATING-SOLUTION RATIO OF ABOUT 4:1 TO 30:1, TO OBTAIN A PARTIALLY TREATED OIL AND ALKALI METAL SALTS OF ORGANIC CONSTITUENTS OF SAID PETROLEUM FRACTION HAVING REPLACEMENT ACIDIC HYDROGEN ATOMS, SEPARATING PARTIALLY TREATED OIL FROM THE AFORESAID ALKALI METAL ORGANIC SALTS AND AQUEOUS ALKALI METAL HYDROXIDE, SEPARATING SAID ALKALI METAL ORGANIC SALTS FROM AQUEOUS ALKALI METAL HYDROXIDE, IMMEDIATELY CONTACTING SAID PARTIALLY TREATED OIL WITH A SOLUTION CONTAINING AT LEAST 90 WEIGHT PERCENT SULFURIC ACID TO OBTAIN TWICETREATED PETROLEUM FRACTION AND ACID SLUDGE, SEPARATING TWICE-TREATED PETROLEUM FRACTION FROM ACID SLUDGE, IMMEDIATELY CONTACTING TWICE-TREATED PETROLEUM FRACTION WITH SUFFICIENT AQUEOUS ALKALI METAL HYDROXIDE TO PRODUCE
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) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |