Granted Patent
Utility
US 4,844,952 · App. 07/139,544
Multilayered finish having good stain resistance
Inventors:
Stephen M. Korenkiewicz, Kurt G. Olson, William G. Boberski, Suryya K. Das, S. Thomas Greer, Raymond E. Zaleski
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Dec 30, 1987
Inventors
Stephen M. Korenkiewicz
Kurt G. Olson
William G. Boberski
Suryya K. Das
S. Thomas Greer
Raymond E. Zaleski
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.