Lubricating oil composition
US8691739B2 · kind B2 · utility
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4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2006 |
| Grant date | Apr 8, 2014 |
| Priority date | — |
| Expiry date | Jun 22, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/25
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To provide a fuel-efficient lubricating oil composition, particularly suitable for internal combustion engines, which has a reduced shear viscosity in an intermediate temperature range from 80 to 100° C., an effective temperature range for reducing fuel consumption.The present invention provides a lubricating oil composition comprising a base oil incorporated with a viscosity index improver, wherein the viscosity index improver has a peak area at a chemical shift between 3.4 and 3.7 ppm in a spectral pattern observed by nuclear magnetic resonance analysis (1H-NMR) accounts for 5% or more of the total peak area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.