Granted Patent
Utility
US 4,095,975 · App. 05/790,275
Continuous recovery of copper metal from acidic solutions
Inventors:
Alkis S. Rappas, John Gerlach
Patented Case
View Patent ↗
Granted: Jun 20, 1978
Filed: Apr 25, 1977
Inventors
Alkis S. Rappas
John Gerlach
Assignee (at issue)
Kennecott Copper Corporation
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.