US4459223A
Expired / Lapsed
US
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Lubricant oil composition with improved friction reducing properties
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1982-05-05
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Granted: 1984-07-10
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Expires: 2002-05-05
Abstract
Abstract A lubricating oil composition having improved friction reducing properties and the method of reducing friction in internal combustion engines by lubricating said engines with said lubricating oil which contains an effective friction reducing amount of an additive which is the reaction product of a dimer carboxylic acid and a polyhydric alcohol having at least three hydroxyl groups.
Inventors
- 👤 Harold Shaub
- 👤 David I. Devore
- 👤 Kenneth S. Kirschenbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:01
CPC Classifications
C; C10; C10M; C10M129/00; C10M129/02; C10M129/68; C10M129/76; C10M145/00; C10M145/18; C10M145/22; C10M2207/00; C10M2207/28; C10M2207/287; C10M2207/289; C10M2209/00; C10M2209/10; C10M2209/102; C10N; C10N2040/00; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A method of reducing friction in an internal combustion engine comprising lubricating said engine using a lubricating oil composition containing from about 0.01 to about 2.0 parts by weight of an additive which is the reaction product of a dimer carboxylic acid having about 24 to about 90 carbon atoms and a polyhydric alcohol having at least three hydroxyl groups and about 3 to about 18 carbon atoms, all weights based on 100 parts by weight of lubricating oil composition.
Claim 2
Independent Claim
80 words
A method of reducing friction in an internal combustion engine comprising lubricating said engine using a lubricating oil composition containing from about 0.01 to about 2.0 parts by weight of an additive which is the reaction product of a dimer carboxylic acid having about 24 to about 90 carbon atoms and a polyhydric alcohol having at least three hydroxyl groups and about 3 to about 18 carbon atoms, all weights based on 100 parts by weight of lubricating oil composition.
Claim 3
Dependent Claim
43 words
The method of claim 1 wherein said dimer carboxylic acid contains about 9 to about 42 carbon atoms between carboxylic acid groups and said reaction product is formed using from about 1 to about 3 moles of alcohol per mole of dimer acid.
Claim 4
Dependent Claim
13 words
The method of claim 2 wherein said polyhydric alcohol has 3 hydroxyl groups.
Claim 5
Dependent Claim
38 words
The method of claim 3 wherein from about 0.01 to about 1.0 parts by weight of said reaction product is used and said carboxylic acid is a fatty acid which contains about 12 to about 22 carbon atoms.
Claim 6
Dependent Claim
21 words
The method of claim 4 wherein said alcohol is selected from the group consisting of glycerol, 1,2,6 trihydroxyhexane and 2,2',2" nitrilotriethanol.
Claim 7
Dependent Claim
21 words
The method of claim 5 wherein said dimer carboxylic acid is the dimer of linoleic acid, oleic acid or mixtures thereof.
Claim 8
Dependent Claim
30 words
The method of claim 2 wherein said dimer carboxylic acid has about 24 to about 60 carbon atoms and said polyhydric alcohol has about 3 to about 12 carbon atoms.
Claim 9
Dependent Claim
38 words
The method of claim 7 wherein from about 0.01 to about 1.0 parts by weight of said reaction product is used and said carboxylic acid is a fatty acid which contains about 12 to about 22 carbon atoms.
Claim 10
Dependent Claim
13 words
The method of claim 8 wherein said polyhydric alcohol has 3 hydroxyl groups.
Claim 11
Dependent Claim
21 words
The method of claim 9 wherein said alcohol is selected from the group consisting of glycerol, 1,2,6 trihydroxyhexane and 2,2',2" nitrilotriethanol.
Claim 12
Dependent Claim
37 words
The method of claim 10 wherein from about 0.05 to about 0.5 parts by weight of said reaction product is used and said dimer carboxylic acid is the dimer of linoleic acid, oleic acid or mixtures thereof.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |