Granted Patent
Utility
US 5,895,520 · App. 08/898,308
Method of separating noxious substances from exhaust gases
Inventors:
Dietrich Rolke, Volker Hohmann, Hans-Jochen Fell
Patented Case
View Patent ↗
Granted: Apr 20, 1999
Filed: Jul 22, 1997
Inventors
Dietrich Rolke
Volker Hohmann
Hans-Jochen Fell
Assignee (at issue)
Metallgesellschaft 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.