Granted Patent
Utility
US 5,693,867 · App. 08/705,136
Process for isolating tetraphenylborates
Inventors:
Rudiger Baur, Hermann Fuchs, Hans-Tobias Macholdt, Jorg Gitzel, Wilfried Theiss
Patented Case
View Patent ↗
Granted: Dec 2, 1997
Filed: Aug 29, 1996
Inventors
Rudiger Baur
Hermann Fuchs
Hans-Tobias Macholdt
Jorg Gitzel
Wilfried Theiss
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.