Patent US2795532A successfully refreshed from Google Patents.
US2795532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining heavy mineral oil fractions with an anhydrous mixture of sodium hydroxide and potassium hydroxide
Assignee: Sunoco Inc
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Filing: 1954-10-04
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Granted: 1957-06-11
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Expires: 1974-10-04
Abstract
No abstract record available.
Inventors
- 👤 Earl M Honeycutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:34
CPC Classifications
C; C10; C10G; C10G19/00; C10G19/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
PROCESS FOR REFINING MINERAL OIL WHICH COMPRISES; CONTACTING NAPHTHENIC-ACID CONTAINING VAPORS OF A MINERAL OIL FRACTION HAVING A.P.I. GRAVITY WITHIN THE APPROXIMATE RANGE FROM 10 TO 40 WITH A LIQUID TREATING AGENT CONSISTING ESSENTIALLY OF A MOLTEN ANHYDROUS MIXTURE OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE, SAID MIXTURE CONTAINING ABOUT 10 TO 95 MOLES OF SODIUM HYDROXIDE PER 90 TO 5 MOLES OF POTASSIUM HYDROXIDE, THEREBY TO INHIBIT COATING AND PLUGGING OF THE APPARATUS EMPLOYED WITH CARBONACEOUS MATERIAL FORMED DURING THE CONTACTING.
Claim 2
Dependent Claim
81 words
PROCESS FOR REFINING MINERAL OIL WHICH COMPRISES; CONTACTING NAPHTHENIC-ACID CONTAINING VAPORS OF A MINERAL OIL FRACTION HAVING A.P.I. GRAVITY WITHIN THE APPROXIMATE RANGE FROM 10 TO 40 WITH A LIQUID TREATING AGENT CONSISTING ESSENTIALLY OF A MOLTEN ANHYDROUS MIXTURE OF SODIUM HYDROXIDE AND POTASSIUM HYDROXIDE, SAID MIXTURE CONTAINING ABOUT 10 TO 95 MOLES OF SODIUM HYDROXIDE PER 90 TO 5 MOLES OF POTASSIUM HYDROXIDE, THEREBY TO INHIBIT COATING AND PLUGGING OF THE APPARATUS EMPLOYED WITH CARBONACEOUS MATERIAL FORMED DURING THE CONTACTING.
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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |