Granted Patent
Utility
US 5,884,475 · App. 08/816,365
Method and device for introducing liquid into an exhaust-gas purification system
Inventors:
Lothar Hofmann, Ronald Neufert, Wieland Mathes
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Mar 13, 1997
Inventors
Lothar Hofmann
Ronald Neufert
Wieland Mathes
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.