Granted Patent
Utility
US 5,276,166 · App. 07/814,655
Polyazetidinol containing materials
Inventors:
Shanti Swarup, Gregory J. McCollum
Patented Case
View Patent ↗
Granted: Jan 4, 1994
Filed: Dec 30, 1991
Inventors
Shanti Swarup
Gregory J. McCollum
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.