Granted Patent
Utility
US 4,759,986 · App. 06/922,431
Electrically conductive polybenzimidazole fibrous material
Inventors:
Y. M. Faruq Marikar, Michael M. Besso
Patented Case
View Patent ↗
Granted: Jul 26, 1988
Filed: Oct 23, 1986
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.