Granted Patent
Utility
US 5,147,452 · App. 07/690,434
Method of agglomerating mineral ore concentrate
Inventors:
Dale J. Anderson, David C. Cloutier
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Apr 24, 1991
Inventors
Dale J. Anderson
David C. Cloutier
Assignee (at issue)
Betz Laboratories, Inc.
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.