Granted Patent
Utility
US 6,200,535 · App. 09/339,400
Purification device having a porous body for purifying pollutants from an exhaust gas stream
Inventors:
Martin Hartweg, Rolf-Dirc Roitzheim, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach
Patented Case
View Patent ↗
Granted: Mar 13, 2001
Filed: Jun 23, 1999
Inventors
Martin Hartweg
Rolf-Dirc Roitzheim
Andrea Seibold
Leonhard Walz
Thomas Fetzer
Bernd Morsbach
Assignee (at issue)
Daimlerchrysler 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.