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US4167486A
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Lubricant composition containing a lubricity agent
Assignee: Mobil Oil AS
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Filing: 1978-07-20
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Granted: 1979-09-11
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Expires: 1998-07-20
Abstract
Abstract Lubricating oils containing olefin polymerizable acid esters and dimers and/or trimers thereof have been found to increase fuel economy in internal combustion engines. This is done by deposition of the additive on the lubricated surface.
Inventors
- 👤 Carleton N. Rowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:33
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/1905; C10M; C10M129/00; C10M129/02; C10M129/68; C10M129/72; C10M2205/00; C10M2205/02; C10M2205/028; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2209/00; C10M2209/02; C10M2209/10; C10M2209/102; C10M2209/103; C10M2209/108; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2040/00; C10N2040/25; C10N2040/251; C10N2040/255; C10N2040/28
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
99 words
A method for reducing fuel consumption in an internal combustion engine by treating the moving surfaces thereof with a composition comprising a major amount of a lubricant containing a fuel reducing amount of an acid ester that is soluble in a predominant amount of a hydrocarbon oil, either mineral or synthetic, and that has at least two olefinic double bonds, at least one pair of which has one of the following configurations: --C═C--C--C═C-- and --C═C--C═C-- or (2) the dimer or trimer of such acid ester whereby said acid ester, trimer or dimer is deposited on the said moving surfaces.
Claim 2
Independent Claim
99 words
A method for reducing fuel consumption in an internal combustion engine by treating the moving surfaces thereof with a composition comprising a major amount of a lubricant containing a fuel reducing amount of an acid ester that is soluble in a predominant amount of a hydrocarbon oil, either mineral or synthetic, and that has at least two olefinic double bonds, at least one pair of which has one of the following configurations: --C═C--C--C═C-- and --C═C--C═C-- or (2) the dimer or trimer of such acid ester whereby said acid ester, trimer or dimer is deposited on the said moving surfaces.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the lubricant is a mineral oil.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the lubricant is a synthetic hydrocarbon oil.
Claim 5
Dependent Claim
20 words
The method of claim 1 wherein the lubricant is a mixture of a mineral oil and a synthetic hydrocarbon oil.
Claim 6
Dependent Claim
26 words
The method of claim 3 wherein said synthetic hydrocarbon oil is in admixture with not more than about 20% by weight of another synthetic lubricating oil.
Claim 7
Dependent Claim
40 words
The method of claim 1 wherein the lubricant composition comprises a dimer, a trimer, or mixtures thereof, of a linoleic acid ester of the formula CH.sub.3 (CH.sub.2).sub.4 CH═CHCH.sub.2 CH═CH(CH.sub.2).sub.7 COOR' wherein R' is a C 1 -C 20 hydrocarbyl group.
Claim 8
Dependent Claim
12 words
The method of claim 6 wherein R' is aryl, aralkyl or alkyl.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein the lubricant is a mineral oil.
Claim 10
Dependent Claim
13 words
The method of claim 6 wherein the lubricant is a synthetic hydrocarbon oil.
Claim 11
Dependent Claim
19 words
The method of claim 6 wherein the lubricant is a mixture of mineral oil and a synthetic hydrocarbon oil.
Claim 12
Dependent Claim
26 words
The method of claim 9 wherein said synthetic hydrocarbon oil is in admixture with not more than about 20% by weight of another synthetic lubricating oil.
Claim 13
Dependent Claim
23 words
The method of claim 1 wherein the lubricant contains a fuel reducing amount of the triisodecyl ester of the trimer of linoleic acid.
Claim 14
Dependent Claim
12 words
The method of claim 12 wherein the lubricant is a mineral oil.
Claim 15
Dependent Claim
27 words
The method of claim 12 wherein the lubricant is a mixture of synthetic hydrocarbon oil and not more than 20% by weight of another synthetic lubricating oil.
Claim 16
Dependent Claim
17 words
The method of claim 12 comprising from about 0.5% to about 10% by weight of said ester.
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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |