Granted Patent
Utility
US 5,296,541 · App. 08/109,895
Polyazetidinol containing materials
Inventors:
Shanti Swarup, Gregory J. McCollum
Patented Case
View Patent ↗
Granted: Mar 22, 1994
Filed: Aug 23, 1993
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.