US2785194A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction of mineral oil contaminants from synthetic lubricants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-12-17
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Granted: 1957-03-12
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Expires: 1973-12-17
Abstract
No abstract record available.
Inventors
- 👤 Michael F Hoare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:41
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0075; C10M175/005; C10M2207/00; C10M2207/28; C10M2207/282; C10M2207/2825; C10M2207/30; C10M2207/301; C10N; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A PROCESS FOR THE REMOVAL OF MINERAL OIL FROM SYNTHETIC ESTER LUBRICATING OIL COMPOSITIONS WHICH HAVE BECOME CONTAMINATED WITH MINERAL OIL WHEREIN SAID SYNTHETIC OILS ARE POLYCARBOXYLIC ACID ESTERS CONSISTING OF HYDROCARBON CHAINS JOINED BY ESTER GROUPS, SAID CHAINS BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON CHAINS AND ALIPHATIC HYDROCARBON CHAINS CONTAINING ETHER LINKAGES THEREIN, WHICH COMPRISES THE STEPS OF CONTACTING THE SAID CONTAMINATED SYNTHETIC LUBRICATING OIL WITH A SUBSTANTIALLY ANHYDROUS ALIPHATIC SATURATED HYDROCARBON MONOCARBOXYLIC ACID CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE, WHEREBY THE SYNTHETIC ESTER LUBRICATING OIL DISSOLVES IN SAID ACID AND FORMS THEREWITH A PHASE SEPARATE FROM THE MINERAL OIL, SEPARATING THE TWO PHASES SO FORMED AND EXTRACTING THE SYNTHETIC LUBRICATING OIL FROM SAID ACID PHASE.
Claim 2
Dependent Claim
123 words
A PROCESS FOR THE REMOVAL OF MINERAL OIL FROM SYNTHETIC ESTER LUBRICATING OIL COMPOSITIONS WHICH HAVE BECOME CONTAMINATED WITH MINERAL OIL WHEREIN SAID SYNTHETIC OILS ARE POLYCARBOXYLIC ACID ESTERS CONSISTING OF HYDROCARBON CHAINS JOINED BY ESTER GROUPS, SAID CHAINS BEING SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON CHAINS AND ALIPHATIC HYDROCARBON CHAINS CONTAINING ETHER LINKAGES THEREIN, WHICH COMPRISES THE STEPS OF CONTACTING THE SAID CONTAMINATED SYNTHETIC LUBRICATING OIL WITH A SUBSTANTIALLY ANHYDROUS ALIPHATIC SATURATED HYDROCARBON MONOCARBOXYLIC ACID CONTAINING FROM 1 TO 6 CARBON ATOMS PER MOLECULE, WHEREBY THE SYNTHETIC ESTER LUBRICATING OIL DISSOLVES IN SAID ACID AND FORMS THEREWITH A PHASE SEPARATE FROM THE MINERAL OIL, SEPARATING THE TWO PHASES SO FORMED AND EXTRACTING THE SYNTHETIC LUBRICATING OIL FROM SAID ACID PHASE.
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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |