Group III base stocks and lubricant compositions
US11352579B2 · kind B2 · utility
0Cited by
24References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2018 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Dec 17, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/252
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed are Group III base stocks comprising at least 30 wt % naphthenes, a viscosity index from 120 to 145; and a unique ratio of molecules with multi-ring naphthenes to single ring naphthenes (2R+N/1RN). A method for preparing the base stocks is also disclosed. Also disclosed is a lubricating oil having the base stock as a major component, and an additive as a minor component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.