Inventor
ZHANG GUIRU
US33 patents
⚠️ This page may combine multiple inventors who share the name “ZHANG GUIRU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NOXELL CORP
10 patentsUS9943472B2Apr 17, 2018
Acid perspiration resistant fluorescent compounds for treating hair
NOXELL CORP0 citations42
US9913791B2Mar 13, 2018
Method for improving acid perspiration resistance of fluorescent compounds on hair
NOXELL CORP0 citations42
US9872823B2Jan 23, 2018
Method for improving fastness properties of fluorescent compounds on hair
NOXELL CORP0 citations42
US9855202B2Jan 2, 2018
Compositions for dyeing hair with cationic direct dyes
NOXELL CORP0 citations42
US9849072B2Dec 26, 2017
Method of coloring hair with direct dye compounds
NOXELL CORP0 citations42
US9844501B2Dec 19, 2017
Compositions for dyeing hair with cationic direct dyes
NOXELL CORP0 citations42
US9839592B2Dec 12, 2017
Fluorescent compounds for treating hair
NOXELL CORP0 citations42
US9839593B2Dec 12, 2017
Method of coloring hair with direct dye compounds
NOXELL CORP0 citations42
US10034823B2Jul 31, 2018
Method of coloring hair with washfast blue imidazolium direct dye compounds
NOXELL CORP0 citations38
US9982138B2May 29, 2018
Hair color compositions comprising stable violet-blue to blue imidazolium dyes
NOXELL CORP0 citations38
PROCTER & GAMBLE
8 patentsUS7988740B2Aug 2, 2011
Keratin dyeing compositions comprising a radical scavenger and use thereof
PROCTER & GAMBLE10 citations82
US7985266B2Jul 26, 2011
Keratin dyeing compositions comprising a radical scavenger and a chelant and use thereof
PROCTER & GAMBLE16 citations82
US7507262B2Mar 24, 2009
Compositions for oxidatively dyeing keratin fibers and methods for using such compositions
PROCTER & GAMBLE6 citations71
US7678158B2Mar 16, 2010
Compositions for oxidatively dyeing keratin fibers and methods for using such compositions
PROCTER & GAMBLE4 citations60
US7303592B2Dec 4, 2007
Hair coloring compositions for use in oxidative hair dyeing
PROCTER & GAMBLE3 citations60
US9216945B2Dec 22, 2015
Methods of synthesizing 2-substituted-1,4-benzenediamine
PROCTER & GAMBLE0 citations51
US12398104B2Aug 26, 2025
Odorless thiols for permanent waving, straightening and depilatory applications
PROCTER & GAMBLE0 citations47
US7850742B2Dec 14, 2010
Keratin dyeing compounds, keratin dyeing compositions containing said compounds, and use thereof
PROCTER & GAMBLE0 citations40
LIM MUILL
7 patentsUS8460397B2Jun 11, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a pyridine and derivatives thereof
LIM MUILL12 citations83
US8444709B2May 21, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a 2-aminophenol and derivatives thereof
LIM MUILL11 citations83
US8444714B2May 21, 2013
Oxidative dyeing compositions comprising an 1-Hexy1/Hepty1-4,5-diaminopyrazole and a benzene-1,3-diol and derivatives thereof
LIM MUILL11 citations83
US8444713B2May 21, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a naphthalen-1-ol and derivatives thereof
LIM MUILL12 citations83
US8444710B2May 21, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a m-aminophenol and derivatives thereof
LIM MUILL11 citations83
US8444711B2May 21, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a benzene-1,3-diamine and derivatives thereof
LIM MUILL10 citations83
US8444712B2May 21, 2013
Oxidative dyeing compositions comprising an 1-hexyl/heptyl-4,5-diaminopyrazole and a benzo[1,3]dioxol-5-ylamine and derivatives thereof
LIM MUILL12 citations83