Granted Patent
Utility
US 6,228,974 · App. 08/345,918
Aminoplast curable film-forming compositions providing films having resistance to acid etching
Inventors:
Gregory J. McCollum, Debra L. Singer, Kurt G. Olson, S. Tonya Stefko, Michael A. Mayo, Dennis L. Faler
Patented Case
View Patent ↗
Granted: May 8, 2001
Filed: Nov 28, 1994
Inventors
Gregory J. McCollum
Debra L. Singer
Kurt G. Olson
S. Tonya Stefko
Michael A. Mayo
Dennis L. Faler
Assignee (at issue)
PPG Industries Ohio, 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.