Patent · US Expired

Compositions and processes for dyeing keratin fibers with azo compounds

US6179881A · kind A · utility

40Cited by
5References
36Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 23, 1998
Grant dateJan 30, 2001
Priority date—
Expiry dateNov 23, 2018

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C281/16
  • WIPO fieldPharmaceuticals
  • WIPO sectorChemistry

Abstract

Azo compounds of the 2-(4-amino)phenyldiazinecarboximidamide type and 2-(4-amino)phenylhydrazinecarboximidamide type, a process for their synthesis, their use for dyeing keratin fibers, dye compositions containing them, and dyeing processes.

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