Combination of additives for lubricating oils
US6734149B2 · kind B2 · utility
1Cited by
11References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 10, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jun 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition comprising a compound of formula I: wherein W represents O, S—A2, or two groups, R3 and R4; bonds a and b are single or double bonds, provided that one of a and b is a single bond and the other is a double bond; c is a single or double bond, and d is a single bond, double bond, or two single bonds, provided that d is a single bond when c is a double bond, d is not a single bond when c is a single bond, and W is R3 and R4 when d is two single bonds; A1, A2, B1 and B2 are independently hydrogen, alkyl, alkenyl, aralkyl or one of the groups depicted in Scheme 1: and a dithiophosphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.