Granted Patent
Utility
US 6,593,449 · App. 10/030,412
Method for producing polybenzimidazole sintered compact
Inventors:
Noriyuki Niwa, Yoshisato Sasaki
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Nov 9, 2001
Inventors
Noriyuki Niwa
Yoshisato Sasaki
Assignee (at issue)
Clariant Finance (BVI) 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.