Granted Patent
Utility
US 4,935,042 · App. 07/278,466
Exhaust gas treating device
Inventors:
Takatoshi Sudo, Shigeru Ukawa, Hiroshi Maeno, Noriyuki Oda
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Dec 1, 1988
Inventors
Takatoshi Sudo
Shigeru Ukawa
Hiroshi Maeno
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.