Granted Patent
Utility
US 6,003,306 · App. 08/953,978
Method and apparatus for nitrogen oxide emission of a direct injection internal combustion engine
Inventors:
Ronald Kalversberg, Gunter Karl, Roland Kemmler
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Oct 20, 1997
Inventors
Ronald Kalversberg
Gunter Karl
Roland Kemmler
Assignee (at issue)
Daimlerchrysler 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.