Granted Patent
Utility
US 5,281,749 · App. 07/859,441
Process for reducing the residual content of free alkylating agent in aqeous solutions of amphoteric or zwitterionic surfactants
Inventors:
Guenter Uphues, Uwe Ploog, Klaudia Bischof, Kenan Kenar, Pavel Sladek
Patented Case
View Patent ↗
Granted: Jan 25, 1994
Filed: May 28, 1992
Inventors
Guenter Uphues
Uwe Ploog
Klaudia Bischof
Kenan Kenar
Pavel Sladek
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.