Granted Patent
Utility
US 4,234,401 · App. 06/051,053
Method for recovery and use of zinc from a leach solution
Inventor:
James R. Brannan
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Jun 22, 1979
Inventor
James R. Brannan
Assignee (at issue)
Diamond Shamrock 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.