Patent · US Expired

Pyrrole derivatives of 1,4-naphthoquinone and of 1,4-dihydroxynaphthalene for dyeing keratin fibers, compositions comprising the same, and dyeing process

US6022379A · kind A · utility

18Cited by
1References
26Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 27, 1998
Grant dateFeb 8, 2000
Priority date—
Expiry dateFeb 27, 2018

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D207/48
  • WIPO fieldPharmaceuticals
  • WIPO sectorChemistry

Abstract

Pyrrole derivatives of 1,4-naphthoquinone and of 1,4-dihydroxynaphthalene, dye compositions containing them and the corresponding dyeing process.

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