Granted Patent
Utility
US 5,770,142 · App. 08/874,860
Process for manufacturing sintered polybenzimidazole article
Inventors:
Yoshisato Sasaki, Minoru Kurisaki
Patented Case
View Patent ↗
Granted: Jun 23, 1998
Filed: Jun 13, 1997
Inventors
Yoshisato Sasaki
Minoru Kurisaki
Assignee (at issue)
Hoechst Japan Limited
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.