Granted Patent
Utility
US 5,500,024 · App. 08/362,673
Ultraviolet absorbing lenses and methods of manufacture thereof
Inventors:
William M. Hung, Kai C. Su
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Dec 22, 1994
Inventors
William M. Hung
Kai C. Su
Assignee (at issue)
Ciba-Geigy
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.