Granted Patent
Utility
US 4,492,802 · App. 06/369,760
Process for manufacture of quaternary ammonium compounds
Inventors:
Horst Rutzen, Peter Nikolaus, Martin Bischoff, Rudolf Lehmann
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Apr 19, 1982
Inventors
Horst Rutzen
Peter Nikolaus
Martin Bischoff
Rudolf Lehmann
Assignees (at issue)
Henkel Kommanditgesellschaft auf Aktien
Degussa AG
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.