Lubricating compositions for transmissions
US9133414B2 · kind B2 · utility
1Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2008 |
| Grant date | Sep 15, 2015 |
| Priority date | — |
| Expiry date | Apr 18, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a method for improving properties of protection against spalling of transmission lubricating compositions containing sulphur-containing and sulfur-phosphorous compounds comprising a step for adding into the initial transmission lubricating composition, compounds (c) reducing by at least 5% the active sulfur mass content, as measured by the ASTM D1662 standard, in the final composition.The invention also aims at a lubricating composition comprising:
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.