Granted Patent
Utility
US 5,324,789 · App. 07/814,656
Azetidinol reaction products
Inventors:
Shanti Swarup, Padmanabhan Sundararaman, Gregory J. McCollum, Charles M. Kania, James A. Claar
Patented Case
View Patent ↗
Granted: Jun 28, 1994
Filed: Dec 30, 1991
Inventors
Shanti Swarup
Padmanabhan Sundararaman
Gregory J. McCollum
Charles M. Kania
James A. Claar
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.