Granted Patent
Utility
US 5,648,149 · App. 08/398,931
Adhesion of thermoset polyurethane to rigid transparent substrates
Inventors:
Thomas G. Rukavina, John B. Slobodnik
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Mar 6, 1995
Inventors
Thomas G. Rukavina
John B. Slobodnik
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.