Granted Patent
Utility
US 5,891,960 · App. 08/928,533
Coating compositions with citric acid containing polymers for enhanced adhesion to substrates
Inventors:
James A. Claar, Karl F. Schimmel, Shanti Swarup, Bruce A. Connelly
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Sep 12, 1997
Inventors
James A. Claar
Karl F. Schimmel
Shanti Swarup
Bruce A. Connelly
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.