Granted Patent
Utility
US 5,653,823 · App. 08/546,024
Non-chrome post-rinse composition for phosphated metal substrates
Inventors:
Mark W. McMillen, Richard M. Nugent, Jr.
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: Oct 20, 1995
Inventors
Mark W. McMillen
Richard M. Nugent, Jr.
Assignee (at issue)
PPG Industries, Inc.
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.