Granted Patent
Utility
US 4,867,538 · App. 07/028,352
Organic nonlinear optical media
Inventors:
Hyun-Nam Yoon, Thomas M. Leslie, Ronald N. DeMartino
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Mar 20, 1987
Inventors
Hyun-Nam Yoon
Thomas M. Leslie
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.