Granted Patent
Utility
US 5,456,079 · App. 08/246,933
Device for the thermal regeneration of particle filters for diesel engine exhaust gas
Inventor:
Herbert Langen
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: May 20, 1994
Inventor
Herbert Langen
Assignee (at issue)
Firma J. Eberspacher
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.