Lubricating compositions
US8557752B2 · kind B2 · utility
0Cited by
152References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2006 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Jul 27, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is provided an automatic transmission fluid composition comprising a major amount of a base oil; one or more friction modifiers, wherein total nitrogen content provided by the one or more friction modifiers is greater than or equal to about 300 ppm; and one or more ashless dispersants, wherein the total nitrogen content provided by the one or more ashless dispersants is greater than or equal to about 500 ppm. The automatic transmission fluid may have a kinematic viscosity at 100° C. of from about 4 cSt to about 6.5 cSt and a Brookfield viscosity at −40 ° C. of from about 4,000 cP to about 20,000 cP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.