Granted Patent
Utility
US 5,950,422 · App. 09/050,648
Method and device for converting a pollutant in an exhaust gas in a catalytic converter
Inventor:
Winfried Dolling
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Mar 30, 1998
Inventor
Winfried Dolling
Assignee (at issue)
Seimens 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.