Granted Patent
Utility
US 6,438,947 · App. 09/852,349
Method for adapting a raw NOx concentration value of an internal combustion engine operating with an excess of air
Inventors:
Wolfgang Ludwig, Corinna Pfleger, Hong Zhang
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: May 9, 2001
Inventors
Wolfgang Ludwig
Corinna Pfleger
Hong Zhang
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.