Granted Patent
Utility
US 6,737,018 · App. 10/046,158
Corrosion-resistant chromium steel for architectural and civil engineering structural elements
Inventors:
Hiroki Ota, Takumi Ujiro, Junichiro Hirasawa, Osamu Furukimi
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Jan 16, 2002
Inventors
Hiroki Ota
Takumi Ujiro
Junichiro Hirasawa
Osamu Furukimi
Assignee (at issue)
JFE Steel 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.