Granted Patent
Utility
US 6,652,601 · App. 09/959,112
Agent for dyeing fibers comprising an indoline/indolium derivative
Inventors:
Guido Sauter, Hans-Juergen Braun, Nadia Reichlin
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Oct 17, 2001
Inventors
Guido Sauter
Hans-Juergen Braun
Nadia Reichlin
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.