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US4208293A
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Improved crankcase lubricant composition
Assignee: Ethyl Corp
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Filing: 1978-11-13
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Granted: 1980-06-17
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Expires: 1998-11-13
Abstract
Abstract Lubricating oil adapted for use as a crankcase lubricant in internal combustion engines containing a friction-reducing amount of a fatty acid amide or ester of diethanolamine.
Inventors
- 👤 Edward F. Zaweski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:27
CPC Classifications
C; C10; C10M; C10M141/00; C10M141/10; C10M133/00; C10M133/02; C10M133/04; C10M133/06; C10M133/08; C10M133/16; C10M137/00; C10M137/02; C10M137/04; C10M137/10; C10M2203/00; C10M2203/10; C10M2205/00; C10M2205/02; C10M2205/028; C10M2207/00; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/08; C10M2215/082; C10M2215/24; C10M2215/28; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
48 words
In a lubricating oil formulated for use in the crankcase of an internal combustion engine, the improvement of including in said formulated oil about 0.05-5 wt % of a fatty acid amide of diethanol amine wherein said fatty acid contains 8-20 carbon atoms wherein engine friction is reduced.
Claim 2
Dependent Claim
48 words
In a lubricating oil formulated for use in the crankcase of an internal combustion engine, the improvement of including in said formulated oil about 0.05-5 wt % of a fatty acid amide of diethanol amine wherein said fatty acid contains 8-20 carbon atoms wherein engine friction is reduced.
Claim 3
Dependent Claim
10 words
A composition of claim 1 wherein said additive is N,N-bis-(2-hydroxyethyl)oleamide.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |