Granted Patent
Utility
US 5,886,764 · App. 08/874,189
Polyester resin-based high index ophthalmic lenses having improved optical uniformity and/or tintability
Inventors:
Thomas J. Engardio, Philip D. Dalsin, Dae Ki Kang, Jean S. Lee
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jun 13, 1997
Inventors
Thomas J. Engardio
Philip D. Dalsin
Dae Ki Kang
Jean S. Lee
Assignee (at issue)
Signet Armorlite, 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.