Granted Patent
Utility
US 6,331,241 · App. 09/624,292
Method of making chromium-plated steel
Inventor:
Ersan Ilgar
Patented Case
View Patent ↗
Granted: Dec 18, 2001
Filed: Jul 24, 2000
Inventor
Ersan Ilgar
Assignee (at issue)
USX 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.