Granted Patent
Utility
US 4,405,412 · App. 06/362,589
Removal of copper contamination from tin plating baths
Inventor:
Christy A. Nardelli
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Mar 29, 1982
Inventor
Christy A. Nardelli
Assignee (at issue)
Dart Industries 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.