Granted Patent
Utility
US 4,615,747 · App. 06/682,456
Process for producing aluminum material for use in vacuum
Inventors:
Yutaka Kato, Kenji Tsukamoto, Eizo Isoyama
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Dec 17, 1984
Inventors
Yutaka Kato
Kenji Tsukamoto
Eizo Isoyama
Assignee (at issue)
Showa Aluminum Corp.
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.