Granted Patent
Utility
US 4,829,136 · App. 07/194,056
Compositions for producing polymers of high refractive index
Inventor:
Stephanie J. Oates
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: May 13, 1988
Inventor
Stephanie J. Oates
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.