Granted Patent
Utility
US 5,254,271 · App. 07/861,451
Ammonium compounds, preparation thereof and use thereof as cleaning agent, cosmetic raw material and softener, in particular as final-rinse fabric softner
Inventors:
Ingo Hamann, Elke Hohn, Hans-Jurgen Kohle, Winfried Wehner, Joachim Weigand
Patented Case
View Patent ↗
Granted: Oct 19, 1993
Filed: Apr 1, 1992
Inventors
Ingo Hamann
Elke Hohn
Hans-Jurgen Kohle
Winfried Wehner
Joachim Weigand
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.