Granted Patent
Utility
US 5,073,532 · App. 07/559,095
Catalyst for purifying exhaust gases from internal combustion engines and method of making the catalyst
Inventors:
Rainer Domesle, Bernd Engler, Edgar Koberstein, Peter J. Schubert
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Jul 30, 1990
Inventors
Rainer Domesle
Bernd Engler
Edgar Koberstein
Peter J. Schubert
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.