Granted Patent
Utility
US 5,511,413 · App. 08/118,021
Method and device for determining the load condition of particle filters
Inventors:
Wolfgang Pfister, Walter Blaschke, Erwin Burner, Heinrich Wacker, Peter Steiner
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Sep 8, 1993
Inventors
Wolfgang Pfister
Walter Blaschke
Erwin Burner
Heinrich Wacker
Peter Steiner
Assignee (at issue)
J. Eberspaecher GmbH & Co. KG
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.