Granted Patent
Utility
US 6,432,225 · App. 09/687,807
Non-chromated oxide coating for aluminum substrates
Inventor:
Matthias P. Schriever
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Oct 13, 2000
Inventor
Matthias P. Schriever
Assignee (at issue)
The Boeing Company
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.