Granted Patent
Utility
US 5,087,430 · App. 07/500,244
Process for purifying exhaust gas
Inventors:
Masayuki Hanada, Morio Fukuda, Takeo Koshikawa, Akihiro Yamauchi, Hiroshi Ogura
Patented Case
View Patent ↗
Granted: Feb 11, 1992
Filed: Mar 27, 1990
Inventors
Masayuki Hanada
Morio Fukuda
Takeo Koshikawa
Akihiro Yamauchi
Hiroshi Ogura
Assignees (at issue)
Mitsubishi Petrochemical Company Limited
Mitsubishi Petrochemical Engineering Co., Ltd.
Chemicals Industries 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.