Granted Patent
Utility
US 4,933,053 · App. 07/147,955
Carbazole-containing, electrically conductive polysiloxanes
Inventor:
Bernd Tieke
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Jan 25, 1988
Inventor
Bernd Tieke
Assignee (at issue)
Ciba-Geigy
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.