Granted Patent
Utility
US 5,098,796 · App. 07/673,923
Chromium-zinc anti-tarnish coating on copper foil
Inventors:
Lifun Lin, Chung-Yao Chao
Patented Case
View Patent ↗
Granted: Mar 24, 1992
Filed: Mar 25, 1991
Inventors
Lifun Lin
Chung-Yao Chao
Assignee (at issue)
Olin 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.