Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Composition for dyeing keratin fibers, comprising 2,3-diamino-6,7-dihydro-1H,5H-pyrazolo[1,2-a]pyrazol-1-one, 6-chloro-2-methyl-5-aminophenol and a substituted meta-aminophenol

US Patent 7651537 · Granted Jan 26, 2010

Assignee

Inventors

View full patent text on Google Patents →