Granted Patent
Utility
US 5,906,716 · App. 08/817,382
Metallized cation exchange membrane
Inventors:
Petra Mertesdorf, Arnold Schneller, Reinhard Wagener, Helmut Witteler
Patented Case
View Patent ↗
Granted: May 25, 1999
Filed: Apr 17, 1997
Inventors
Petra Mertesdorf
Arnold Schneller
Reinhard Wagener
Helmut Witteler
Assignee (at issue)
Hoechst 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.