Granted Patent
Utility
US 4,725,501 · App. 06/737,859
Primer for adherence to plastic substrates
Inventors:
Thomas G. Rukavina, Chia-Cheng Lin
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: May 28, 1985
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.