Granted Patent
Utility
US 5,120,695 · App. 07/556,097
Catalyst for purifying exhaust gases from internal combustion engines and gas turbines operated at above the stoichiometric ratio
Inventors:
Stephan Blumrich, Reinhold Brand, Bernd Engler, Wolfgang Honnen, Edgar Koberstein
Patented Case
View Patent ↗
Granted: Jun 9, 1992
Filed: Jul 23, 1990
Inventors
Stephan Blumrich
Reinhold Brand
Bernd Engler
Wolfgang Honnen
Edgar Koberstein
Assignee (at issue)
Degusaa Aktiengesellschaft (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.