Granted Patent
Utility
US 4,238,233 · App. 06/031,958
Aluminum alloy for cladding excellent in sacrificial anode property and erosion-corrosion resistance
Inventors:
Kazuo Yamada, Koji Mikami, Shigetake Imaizumi
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Apr 19, 1979
Inventors
Kazuo Yamada
Koji Mikami
Shigetake Imaizumi
Assignee (at issue)
MITSUBISHI ALUMINUM CO., LTD.
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.