Granted Patent
Utility
US 6,248,313 · App. 08/981,530
Hair cosmetic preparations containing cationic biopolymers
Inventors:
Rolf Wachter, Joerg Kahre, Matthias Hofmann, Michael Heyer
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Feb 24, 1998
Inventors
Rolf Wachter
Joerg Kahre
Matthias Hofmann
Michael Heyer
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.