Granted Patent
Utility
US 6,442,932 · App. 09/695,519
Method and device for the catalytic reduction of nitrogen oxides contained in the off-gas from a combustion system
Inventors:
Lothar Hofmann, Gunther Pajonk, Manfred Weigl, Gerhard Wissler
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Oct 24, 2000
Inventors
Lothar Hofmann
Gunther Pajonk
Manfred Weigl
Gerhard Wissler
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.