Patent · US Expired

N-Thioureido and N-ureido phenylene diamines and method of preparing same

US4008272A · kind A · utility

2Cited by
4References
12Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 16, 1975
Grant dateFeb 15, 1977
Priority date—
Expiry dateMay 16, 1995

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07C275/14
  • WIPO fieldPharmaceuticals
  • WIPO sectorChemistry

Abstract

Dye compositions containing the oxidation dye: ##STR1## and the method of using it to dye live human hair.

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