Granted Patent
Utility
US 6,254,782 · App. 09/080,556
Method for recovering and separating metals from waste streams
Inventor:
Lawrence Kreisler
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: May 18, 1998
Inventor
Lawrence Kreisler
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.