Granted Patent
Utility
US 6,406,528 · App. 09/993,840
Use of improved cyan pigments in inkjet inks
Inventors:
Hans-Tobias Macholdt, Ruediger Baur, Eduard Michel, Josef Geisenberger, Heidemarie Menzel, Andreas Harz
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Nov 16, 2001
Inventors
Hans-Tobias Macholdt
Ruediger Baur
Eduard Michel
Josef Geisenberger
Heidemarie Menzel
Andreas Harz
Assignee (at issue)
Clariant Corporation
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.