Granted Patent
Utility
US 5,952,441 · App. 09/000,661
Partially polymerized mixture of diethylene glycol (allyl carbonate) compounds
Inventors:
Robert D. Herold, Bo Wu, Michael O. Okoroafor, Charles R. Wiedrich
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Dec 30, 1997
Inventors
Robert D. Herold
Bo Wu
Michael O. Okoroafor
Charles R. Wiedrich
Assignee (at issue)
PPG Industries Ohio, 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.