Granted Patent
Utility
US 5,789,086 · App. 08/458,755
Stainless steel surface having passivation film
Inventor:
Tadahiro Ohmi
Patented Case
View Patent ↗
Granted: Aug 4, 1998
Filed: Jun 2, 1995
Inventor
Tadahiro Ohmi
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.