Patent · US Expired

Upgrading of pre-processed used oils

US7261808B2 · kind B2 · utility

10Cited by
17References
41Claims
0Family size

Assignee

Inventors

Key dates

Filing dateOct 16, 2002
Grant dateAug 28, 2007
Priority date—
Expiry dateNov 17, 2023

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC10M175/0041
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

A process to further upgrade a pre-processed used lubricating oil by:

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