Granted Patent
Utility
US 4,875,335 · App. 07/247,929
Apparatus and method for treating an exhaust gas from a diesel engine
Inventors:
Yoshimasa Arai, Satoshi Enamito, Noriyuki Oda
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Sep 23, 1988
Inventors
Yoshimasa Arai
Satoshi Enamito
Noriyuki Oda
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.