Granted Patent
Utility
US 6,180,594 · App. 09/438,695
Low-concentration, high-viscosity aqueous fabric softeners
Inventors:
Michael Fender, Hans-Jurgen Kohle, Simone Schussler
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Nov 11, 1999
Inventors
Michael Fender
Hans-Jurgen Kohle
Simone Schussler
Assignee (at issue)
Witco Surfactants 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.