Granted Patent
Utility
US 5,651,897 · App. 08/740,174
Wet oxidation of high strength liquors with high solids content
Inventor:
Richard W. Lehmann
Patented Case
View Patent ↗
Granted: Jul 29, 1997
Filed: Oct 28, 1996
Inventor
Richard W. Lehmann
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.