Granted Patent
Utility
US 6,375,713 · App. 09/734,706
Use of cupric chloride etchant solution in a solvent extraction electrowinning copper refinery
Inventor:
Philip Edelstein
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Dec 13, 2000
Inventor
Philip Edelstein
Assignee (at issue)
Phibro Tech, 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.