Granted Patent
Utility
US 5,329,046 · App. 07/867,185
Biscationic acid amide and imide derivatives and processes for their preparation
Inventors:
Hans-Tobias Macholdt, Siegfried Schiessler, Jorg Gitzel, Erwin Dietz
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jun 25, 1992
Inventors
Hans-Tobias Macholdt
Siegfried Schiessler
Jorg Gitzel
Erwin Dietz
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.