Granted Patent
Utility
US 5,266,109 · App. 07/917,318
EMI shielding pigments, a process for their preparation and their use
Inventors:
Werner Voelker, Wilan Jerke, Kai Dorer, Bernd Dorbath, Karl-Anton Starz, Norbert Giesecke
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jul 23, 1992
Inventors
Werner Voelker
Wilan Jerke
Kai Dorer
Bernd Dorbath
Karl-Anton Starz
Norbert Giesecke
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.