Lubricating compositions
US5486300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Jul 21, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02F7/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to a lubricating oil composition, comprising: PA1 a major amount of an oil of lubricating viscosity; and PA1 (A) an amount of at least one alkali metal overbased salt of an acidic organic compound sufficient to provide at least about 0.005 equivalents of alkali metal per 100 grams of the lubricating composition; PA1 (B) at least about 1.13% by weight of at least one dispersant; PA1 (C) at least one metal dihydrocarbyl dithiophosphate; and PA1 (D) at least one antioxidant, provided that the lubricating oil composition is free of calcium overbased sulfonate; provided that the composition contains less than about 0.08% by weight calcium; and provided that (C) and (D) are not the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.