US2943046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of acidic substances from used lubricating oil employing fatty acid salts of barium, calcium and strontium
Assignee: ExxonMobil Oil Corp
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Filing: 1958-03-24
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Granted: 1960-06-28
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Expires: 1978-03-24
Abstract
No abstract record available.
Inventors
- 👤 Melvin I Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:10
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/08; C10M; C10M175/00; C10M175/0016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE METHOD FOR THE LUBRICATION OF AN INTERNAL COMBUSTION ENGINE OPERATING UPON A "SOUR" FUEL OIL AND CONTAMINATING ITS CRANKCASE OIL WITH STRONGLY ACIDIC SUBSTANCES WHICH COMPRISES WITHDRAWING CRANKCASE OIL FROM THE ENGINE, WASHING THAT OIL WITH AN AQUEOUS SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF THE WATERSOLUBLE BARIUM, CALCIUM, AND STRONTIUM SALTS OF FATTY ACIDS CONTAINING FROM 2 TO 5 CARBON ATOMS, INCLUSIVE, SEPARATING THE WASH REAGENT FROM THE OIL, AND RETURNING THE CLEANED OIL TO THE CRANKCASE.
Claim 2
Independent Claim
82 words
THE METHOD FOR THE LUBRICATION OF AN INTERNAL COMBUSTION ENGINE OPERATING UPON A "SOUR" FUEL OIL AND CONTAMINATING ITS CRANKCASE OIL WITH STRONGLY ACIDIC SUBSTANCES WHICH COMPRISES WITHDRAWING CRANKCASE OIL FROM THE ENGINE, WASHING THAT OIL WITH AN AQUEOUS SOLUTION OF A SALT SELECTED FROM THE GROUP CONSISTING OF THE WATERSOLUBLE BARIUM, CALCIUM, AND STRONTIUM SALTS OF FATTY ACIDS CONTAINING FROM 2 TO 5 CARBON ATOMS, INCLUSIVE, SEPARATING THE WASH REAGENT FROM THE OIL, AND RETURNING THE CLEANED OIL TO THE CRANKCASE.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |