Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole

Process for the manufacture of a hair dye product containing 5,6-dihydroxyindole

US Patent 5704949 · Granted Jan 6, 1998

Estimated economic value: $219,563,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Couplers for use in oxidative hair dyeing2005
Dyes and colorants2004
Couplers for use in oxidative hair dyeing2004
Oxidation hair dyeing systems and process for providing more equalized coloratio2002
Synthesis of melanoquaternary compounds and their use as hair dyes and for skin 2001
Synthesis of melanoquaternary compounds and their use as hair dyes and for skin 2001
Process for the preparation of substituted indoles2000
Process for the preparation of substituted indoles2000
Oxidative hair dyeing process with dihydroxybenzenes and aminoethanethiols1999
Melanoquaternary compounds and their use as hair dyes and for skin treatment1999
Melanoquaternary compounds and their use as hair dyes and for skin treatment1999
Synthesis of quarternary melanin compounds and their use as hair dyes or for ski1998