Granted Patent
Utility
US 6,534,439 · App. 09/345,787
Catalyst for reducing nitrogen oxides in oxidizing and reducing atmospheres
Inventors:
Hans Van Den Tillaart, Jurgen Leyrer, Wolfgang Strehlau, Egbert Lox, Thomas Kreuzer, Carsten Plog, Renato Andorf, Norbert Markert, Thomas Stengel
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Jul 1, 1999
Inventors
Hans Van Den Tillaart
Jurgen Leyrer
Wolfgang Strehlau
Egbert Lox
Thomas Kreuzer
Carsten Plog
Renato Andorf
Norbert Markert
Thomas Stengel
Assignee (at issue)
Degussa-Huels 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.