Granted Patent
Utility
US 5,318,709 · App. 07/778,116
Process for the production of surfactant mixtures based on ether sulfonates and their use
Inventors:
Willi Wuest, Rainer Eskuchen, Bernd Richter
Patented Case
View Patent ↗
Granted: Jun 7, 1994
Filed: Dec 5, 1991
Inventors
Willi Wuest
Rainer Eskuchen
Bernd Richter
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.