Granted Patent
Utility
US 5,502,118 · App. 08/310,147
Polyester salts and their use as charge control agents
Inventors:
Hans-Tobias Macholdt, Ru/ diger Bauer, Joachim Zo/ ller
Patented Case
View Patent ↗
Granted: Mar 26, 1996
Filed: Sep 21, 1994
Inventors
Hans-Tobias Macholdt
Ru/ diger Bauer
Joachim Zo/ ller
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.