Granted Patent
Utility
US 5,766,576 · App. 08/711,229
Oxidation hair dye compositions containing 3,4,5-triaminopyrazole derivatives and 3,4,5-triaminopyrazole derivatives
Inventors:
Isolde Lowe, Stefan Gerstung, Wolfgang Balzer
Patented Case
View Patent ↗
Granted: Jun 16, 1998
Filed: Sep 9, 1996
Inventors
Isolde Lowe
Stefan Gerstung
Wolfgang Balzer
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.