Granted Patent
Utility
US 5,017,420 · App. 07/362,157
Process for preparing electrically conductive shaped articles from polybenzimidazoles
Inventors:
Y. M. Faruq Marikar, Michael M. Besso
Patented Case
View Patent ↗
Granted: May 21, 1991
Filed: Jun 6, 1989
Inventors
Y. M. Faruq Marikar
Michael M. Besso
Assignee (at issue)
Hoechst Celanese 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.