Granted Patent
Utility
US 5,470,552 · App. 08/142,883
Nickel extraction process
Inventors:
Gary A. Kordosky, Stephen M. Olafson
Patented Case
View Patent ↗
Granted: Nov 28, 1995
Filed: Oct 25, 1993
Inventors
Gary A. Kordosky
Stephen M. Olafson
Assignee (at issue)
Henkel Limited
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.