Patent · US Expired

Sulfomethylated phenolic material useful in post primary oil recovery

US4632786A · kind A · utility

3Cited by
30References
5Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 20, 1984
Grant dateDec 30, 1986
Priority date—
Expiry dateJul 20, 2004

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC09K23/12
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

Sulfonated phenolic compounds as well as sulfomethylated phenolic compounds, surfactant system containing such compound and the use of such surfactant systems in post primary oil recovery are disclosed.

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