Granted Patent
Utility
US 4,752,450 · App. 06/882,599
Apparatus for cleaning sulphur and nitrogen containing flue gas
Inventors:
Walter Dietrich, Heinrich Amlinger
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: Jul 7, 1986
Inventors
Walter Dietrich
Heinrich Amlinger
Assignee (at issue)
Leybold-Heraeus GmbH
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.