Granted Patent
Utility
US 5,384,352 · App. 08/098,541
Self lubricating polybenzimidazole shaped articles
Inventors:
Todd Andres, Edwardo Alvarez, William M. Cooper, O. Richard Hughes, Wendell G. Whiteside
Patented Case
View Patent ↗
Granted: Jan 24, 1995
Filed: Jul 28, 1993
Inventors
Todd Andres
Edwardo Alvarez
William M. Cooper
O. Richard Hughes
Wendell G. Whiteside
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.