Granted Patent
Utility
US 6,793,687 · App. 10/257,101
Diaminopyrazole derivatives and oxidation hair dyes containing pyrazolone derivatives
Inventors:
Manuela Javet, Christel Dousse, Dominique Le Cruer
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Oct 8, 2002
Inventors
Manuela Javet
Christel Dousse
Dominique Le Cruer
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.