Granted Patent
Utility
US 4,900,517 · App. 07/248,355
Apparatus for the purification of exhaust gas from diesel motors
Inventors:
Rainer Domesle, Bernd Engler, Edgar Koberstein, Herbert Volker
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Sep 23, 1988
Inventors
Rainer Domesle
Bernd Engler
Edgar Koberstein
Herbert Volker
Assignee (at issue)
Degussa 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.