Oleaginous concentrates
US6605571B1 · kind B1 · utility
5Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1999 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Apr 2, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Concentrates for lubricating oil compositions are prepared by blending at elevated temperature:(A) at least one high molecular weight ashless dispersant; and(B) at least one oil-soluble metal detergent; in the presence of(C) at least one metal salt of a dihydrocarbylphosphorodithoic acid wherein the metal of the metal salt is an alkali metal, an alkaline earth metal, or zinc, aluminium, lead, tin, molybdenum, manganese, nickel or copper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.