Granted Patent
Utility
US 4,824,925 · App. 07/131,889
Novel blocked isocyanates and curable compositions containing the same
Inventors:
Peter Kamarchik, Gregory J. McCollum, George W. Mauer
Patented Case
View Patent ↗
Granted: Apr 25, 1989
Filed: Dec 11, 1987
Inventors
Peter Kamarchik
Gregory J. McCollum
George W. Mauer
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.