Granted Patent
Utility
US 6,408,619 · App. 09/596,893
Method and device for reducing the nitrogen oxides in the exhaust gas of a combustion system
Inventors:
Gerhard Wissler, Gunther Pajonk, Manfred Weigl, Lothar Hofmann
Patented Case
View Patent ↗
Granted: Jun 25, 2002
Filed: Jun 19, 2000
Inventors
Gerhard Wissler
Gunther Pajonk
Manfred Weigl
Lothar Hofmann
Assignee (at issue)
Siemens Aktiengesellschaft
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.