Granted Patent
Utility
US 6,076,682 · App. 09/199,372
Process for froth flotation of silicate-containing iron ore
Inventors:
Jan Olof Gustafsson, Anders Klingberg
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Nov 25, 1998
Inventors
Jan Olof Gustafsson
Anders Klingberg
Assignee (at issue)
AKZO NOBEL N.V.
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.