Lubricating oil ashless dispersant and lubricating oils containing same
US4440659A · kind A · utility
7Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1982 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Feb 19, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2227/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricating oil dispersant is made by grafting an alkyl methacrylate or acrylate and maleic anhydride onto a Bright Stock mineral oil backbone using a free radical generating catalyst and then reacting the product with an amine to form amide or imide groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.