Granted Patent
Utility
US 4,833,883 · App. 07/099,600
Filter unit, and apparatus for treating particulates in an exhaust gas from a diesel engine
Inventors:
Noriyuki Oda, Tetsuo Takehara, Satoshi Enamito
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Sep 22, 1987
Inventors
Noriyuki Oda
Tetsuo Takehara
Satoshi Enamito
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.