Granted Patent
Utility
US 5,139,993 · App. 07/658,476
Method of improving the thermal shock behavior of monolithic catalysts
Inventors:
Felix Schmidt, Bernd Mergner, Rainer Domesle
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Jan 31, 1991
Inventors
Felix Schmidt
Bernd Mergner
Rainer Domesle
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.