Granted Patent
Utility
US 6,238,525 · App. 09/299,630
Process for reducing the nitrogen oxides content of exhaust gas from an internal combustion engine
Inventors:
Egbert Lox, Jurgen Gieshoff, Wolfgang Strehlau, Thomas Kreuzer
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Apr 27, 1999
Inventors
Egbert Lox
Jurgen Gieshoff
Wolfgang Strehlau
Thomas Kreuzer
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.