Granted Patent
Utility
US 6,770,249 · App. 09/478,625
Process to selectively recover metals from waste dusts, sludges and ores
Inventors:
Loren P. Hoboy, Nick A. Wolf, Tonya F. Yoder
Patented Case
View Patent ↗
Granted: Aug 3, 2004
Filed: Jan 5, 2000
Inventors
Loren P. Hoboy
Nick A. Wolf
Tonya F. Yoder
Assignee (at issue)
Chester W. Whitman
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.