Granted Patent
Utility
US 6,616,706 · App. 09/423,507
Method for producing hair dye products
Inventors:
Joerg Kahre, Peter Busch, Thomas Foerster, Hermann Hensen, Holger Tesmann, Markus Sumser, Adrian Pitfield
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Jan 21, 2000
Inventors
Joerg Kahre
Peter Busch
Thomas Foerster
Hermann Hensen
Holger Tesmann
Markus Sumser
Adrian Pitfield
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.