Granted Patent
Utility
US 4,910,249 · App. 07/187,788
Acrylic polymers
Inventors:
Charles M. Kania, Gregory J. McCollum, Masayuki Nakajima
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: May 2, 1988
Inventors
Charles M. Kania
Gregory J. McCollum
Masayuki Nakajima
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.