Method of reducing the presence of sludge in lubricating oils
US5042617A · kind A · utility
39Cited by
12References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1989 |
| Grant date | Aug 27, 1991 |
| Priority date | — |
| Expiry date | Sep 7, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B77/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Sludge can be effectively removed from a lubricating oil by contacting the oil with a dispersant functional group immobilized on a substrate. This results in improved engine cleanliness and control of viscosity increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.