Granted Patent
Utility
US 4,744,967 · App. 07/004,407
Process for the purification of exhaust gases containing oxides of nitrogen and sulfur
Inventors:
Reinhold Brand, Bernd Engler, Peter Kleine-Moellhoff, Edgar Koberstein, Herbert Voelker
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Jan 20, 1987
Inventors
Reinhold Brand
Bernd Engler
Peter Kleine-Moellhoff
Edgar Koberstein
Herbert Voelker
Assignee (at issue)
Degussa AG
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.