Patent US2770580A successfully refreshed from Google Patents.
US2770580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline treatment of petroleum vapors
Assignee: Sunoco Inc
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Filing: 1953-09-17
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Granted: 1956-11-13
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Expires: 1973-09-17
Abstract
No abstract record available.
Inventors
- 👤 Earl M Honeycutt
- 👤 Curtiss C Wallin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:14
CPC Classifications
C; C10; C10G; C10G19/00; C10G19/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN THE REMOVAL OF NAPHTHENIC ACIDS FROM HEAVY PETROLEUM LUBRICATING OIL VAPORS BY CONTACT WITH LIQUID ALKALINE MATERIAL IN A CONTACTING ZONE AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE FROM 600* F. TO 700* F. UNDER REDUCED PRESSURE PERMITTING VAPOR PHASE CONTACTING AT SAID TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES: INITIATING CONTACT OF SAID VAPORS WITH SAID ALKALINE MATERIAL IN A PORTION OF SAID CONTACTING ZONE WHEREIN SAID ALKALINE MATERIAL COMPRISES 60 TO 95 PARTS BY WEIGHT OF LIQUID LUBRICATING OIL, 3 TO 30 PARTS ALKALI METAL NAPHTHENATES, AND 0.2 TO 10 PARTS OF ALKALI METAL HYDROXIDE, WHEREBY FORMATION OF CARBONACEOUS DEPOSITS NORMALLY OCCURRING IN SAID CONTACTIG ZONE AT SAID TEMPERATURE IS INHIBITED.
Claim 2
Dependent Claim
112 words
IN THE REMOVAL OF NAPHTHENIC ACIDS FROM HEAVY PETROLEUM LUBRICATING OIL VAPORS BY CONTACT WITH LIQUID ALKALINE MATERIAL IN A CONTACTING ZONE AT A TEMPERATURE WITHIN THE APPROXIMATE RANGE FROM 600* F. TO 700* F. UNDER REDUCED PRESSURE PERMITTING VAPOR PHASE CONTACTING AT SAID TEMPERATURE, THE IMPROVEMENT WHICH COMPRISES: INITIATING CONTACT OF SAID VAPORS WITH SAID ALKALINE MATERIAL IN A PORTION OF SAID CONTACTING ZONE WHEREIN SAID ALKALINE MATERIAL COMPRISES 60 TO 95 PARTS BY WEIGHT OF LIQUID LUBRICATING OIL, 3 TO 30 PARTS ALKALI METAL NAPHTHENATES, AND 0.2 TO 10 PARTS OF ALKALI METAL HYDROXIDE, WHEREBY FORMATION OF CARBONACEOUS DEPOSITS NORMALLY OCCURRING IN SAID CONTACTIG ZONE AT SAID TEMPERATURE IS INHIBITED.
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |