Granted Patent
Utility
US 4,720,355 · App. 06/836,132
Organic nonlinear optical substrates
Inventor:
Ronald N. DeMartino
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Mar 4, 1986
Inventor
Ronald N. DeMartino
Assignee (at issue)
Hoechst Celanese Corporation
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.