Granted Patent
Utility
US 6,797,663 · App. 10/258,487
Catalyst for exhaust gas purification
Inventors:
Tetsuya Watanabe, Osamu Nakayama, Keisuke Tashiro, Kinichi Iwachido, Hiroshi Tanada
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Oct 25, 2002
Inventors
Tetsuya Watanabe
Osamu Nakayama
Keisuke Tashiro
Kinichi Iwachido
Hiroshi Tanada
Assignee (at issue)
MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
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.