Granted Patent
Utility
US 6,519,935 · App. 10/054,612
Device and method for exhaust-gas aftertreatment in an internal-combustion engine
Inventor:
Manfred Weigl
Patented Case
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Granted: Feb 18, 2003
Filed: Jan 22, 2002
Inventor
Manfred Weigl
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.