Patent · US Expired

Dispersant-viscosity improvers for lubricating oil compositions

US6639034B2 · kind B2 · utility

6Cited by
15References
29Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 23, 2001
Grant dateOct 28, 2003
Priority date—
Expiry dateJan 10, 2022

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10N2070/02
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A process for preparing nitrogen-containing copolymers useful as dispersant-viscosity improvers for lubricating oil compositions, additive concentrates and lubricating oil compositions are described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.