Granted Patent
Utility
US 4,824,926 · App. 07/133,830
Bilayer windshield with an abrasion and solvent resistant polyurethane protective coating
Inventors:
James B. O'Dwyer, Wen-Hsuan Chang, Roger L. Scriven, Joseph Cherenko
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Dec 16, 1987
Inventors
James B. O'Dwyer
Wen-Hsuan Chang
Roger L. Scriven
Joseph Cherenko
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.