Granted Patent
Utility
US 4,816,288 · App. 07/128,860
Primer for adherence to plastic substrates
Inventors:
Thomas G. Rukavina, Chia-Cheng Lin
Patented Case
View Patent ↗
Granted: Mar 28, 1989
Filed: Dec 4, 1987
Inventors
Thomas G. Rukavina
Chia-Cheng Lin
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.