Granted Patent
Utility
US 5,433,935 · App. 08/125,538
Method for reducing nitrogen oxides in flue gases with an arsenic resistant catalyst
Inventor:
Erich Hums
Patented Case
View Patent ↗
Granted: Jul 18, 1995
Filed: Sep 22, 1993
Inventor
Erich Hums
Assignee (at issue)
Siemens Aktiengesellschaft
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.