Granted Patent
Utility
US 6,406,532 · App. 08/528,044
Titanium dioxide powder which contains iron oxide
Inventors:
Werner Hartmann, Dieter Kerner
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Sep 14, 1995
Inventors
Werner Hartmann
Dieter Kerner
Assignee (at issue)
Degussa AG
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.