Granted Patent
Utility
US 4,888,205 · App. 07/142,364
Method of treating a polyolefin substrate with adhesion promoters containing optical brightener
Inventor:
Marvis E. Hartman
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jan 11, 1988
Inventor
Marvis E. Hartman
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.