Ashless, low phosphorus lubricant
US5595964A · kind A · utility
18Cited by
14References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 1, 1995 |
| Grant date | Jan 21, 1997 |
| Priority date | — |
| Expiry date | Sep 1, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition of an oil of lubricating viscosity, an antioxidant, an anti-nitration agent, and optionally a borated product of an epoxide or the reactive equivalent of an epoxide, provides a desirable lubricant for diesel or natural gas-fueled engines. The composition is substantially free from metals and preferably substantially free from phosphorus. The amount of the antioxidant the anti-initration agent are sufficient to reduce the amount of varnish formation in a natural gas engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.