Granted Patent
Utility
US 6,484,883 · App. 09/691,837
Use of cupric chloride in zinc flotation
Inventor:
Philip Edelstein
Patented Case
View Patent ↗
Granted: Nov 26, 2002
Filed: Oct 18, 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.