Granted Patent
Utility
US 6,749,645 · App. 10/089,207
Use of 4-nitro-2,1,3,-benzoxadiazole derivatives as dyes in coloring agents for keratin fibres
Inventors:
Cecile Pasquier, Véronique Charrière, Hans-Juergen Braun
Patented Case
View Patent ↗
Granted: Jun 15, 2004
Filed: Mar 26, 2002
Inventors
Cecile Pasquier
Véronique Charrière
Hans-Juergen Braun
Assignee (at issue)
Wella GmbH
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.