Granted Patent
Utility
US 6,139,807 · App. 09/113,848
Apparatus for removing SO.sub.2 from flue gases and for producing ammonium sulfate solution
Inventors:
Theo Risse, Lourenço Ferrao
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Jul 10, 1998
Inventors
Theo Risse
Lourenço Ferrao
Assignee (at issue)
Lurgi Lentjes Bischoff GmbH
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.