Granted Patent
Utility
US 5,190,699 · App. 07/863,832
Citric acid fatty alcohol ester polyglycol ether sulfosuccinates, process for their preparation and their use
Inventors:
Elke Hohn, Hans-Jurgen Kohle, Georg-Friedrich Urban, Joachim Weigand, Christl Moller
Patented Case
View Patent ↗
Granted: Mar 2, 1993
Filed: Apr 6, 1992
Inventors
Elke Hohn
Hans-Jurgen Kohle
Georg-Friedrich Urban
Joachim Weigand
Christl Moller
Assignee (at issue)
Rewo Chemische Werke 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.