Patent · US Expired

Process for preparing a red iron oxide pigment

US4139398A · kind A · utility

5Cited by
4References
16Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 29, 1977
Grant dateFeb 13, 1979
Priority date—
Expiry dateNov 29, 1997

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC01P2006/60
  • WIPO fieldBasic materials chemistry
  • WIPO sectorChemistry

Abstract

This invention describes a process for preparing a red iron oxide pigment from inorganic ferrous salts and aromatic nitro compounds.

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