Dispersant viscosity index improving additive for lubricating oils
US5851967A · kind A · utility
3Cited by
8References
4Claims
0Family size
Inventors
Key dates
| Filing date | Jan 29, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | Jan 29, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides dispersant viscosity index improving additives for lubricating oils. The additives are copolymers comprising from 92 weight percent to 98 weight percent of a polymer backbone and from 2 weight percent to 8 weight percent branches grafted onto the polymer backbone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.