Granted Patent
Utility
US 5,976,422 · App. 09/037,108
Optical resin composition
Inventors:
Michael O. Okoroafor, Robert D. Herold, Robert A. Smith
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Mar 9, 1998
Inventors
Michael O. Okoroafor
Robert D. Herold
Robert A. Smith
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.