Granted Patent
Utility
US 5,081,174 · App. 07/415,509
Protective coating composition
Inventor:
Ellor J. VanBuskirk
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Oct 2, 1989
Inventor
Ellor J. VanBuskirk
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.