Granted Patent
Utility
US 5,591,377 · App. 08/515,024
Viscous water-based surfactant preparation
Inventors:
Dieter Nickel, Rainer Hofmann
Patented Case
View Patent ↗
Granted: Jan 7, 1997
Filed: Aug 14, 1995
Inventors
Dieter Nickel
Rainer Hofmann
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.