Granted Patent
Utility
US 4,868,008 · App. 07/189,769
Process for preparing electrically conductive shaped articles from polybenzimidazoles
Inventors:
Y. M. Faruq Marikar, Michael M. Besso
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: May 3, 1988
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.