Granted Patent
Utility
US 6,103,816 · App. 07/968,807
Aqueous aminoplast curable film-forming compositions providing films having resistance to acid etching
Inventors:
Shanti Swarup, Debra L. Singer, Gregory J. McCollum, Kurt G. Olson, S. Tonya Stefko, Richard J. Sadvary, Robyn E. McMillan, Michael A. Mayo
Patented Case
View Patent ↗
Granted: Aug 15, 2000
Filed: Oct 30, 1992
Inventors
Shanti Swarup
Debra L. Singer
Gregory J. McCollum
Kurt G. Olson
S. Tonya Stefko
Richard J. Sadvary
Robyn E. McMillan
Michael A. Mayo
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.