Granted Patent
Utility
US 5,993,640 · App. 09/127,431
Method of measuring the CaCO.sub.3 content of a scrubbing suspension, especially for a flue gas desulfurizing absorber
Inventor:
Theo Risse
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Jul 31, 1998
Inventor
Theo Risse
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.