Granted Patent
Utility
US 5,932,629 · App. 08/578,611
Anion-based aqueous printing inks with improved deinkability
Inventors:
Michael Beck, Herbert Fischer, Wolfgang Ritter, Ludwig Schieferstein, Udo Griebsch, Quang Minh Thai
Patented Case
View Patent ↗
Granted: Aug 3, 1999
Filed: Jan 11, 1996
Inventors
Michael Beck
Herbert Fischer
Wolfgang Ritter
Ludwig Schieferstein
Udo Griebsch
Quang Minh Thai
Assignees (at issue)
Henkel Kommanditgesellschaft auf Aktien
Hartmann Druckfarben, 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.