Granted Patent
Utility
US 5,500,323 · App. 08/430,181
Charge control with cyclic polysulfonyldially ammonium salts
Inventors:
Rudiger Baur, Hans-Tobias Macholdt, Wilfried Theiss
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Apr 27, 1995
Inventors
Rudiger Baur
Hans-Tobias Macholdt
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.