Granted Patent
Utility
US 5,962,709 · App. 08/525,693
Process for the aftertreatment of betaines and amphoteric surfactants
Inventors:
Gunter Uphues, Uwe Ploog, Rainer Jeschke, Renate Schick
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Sep 12, 1995
Inventors
Gunter Uphues
Uwe Ploog
Rainer Jeschke
Renate Schick
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.