Granted Patent
Utility
US 5,246,728 · App. 07/647,037
Scratch-resistant coating and method of making coated lenses
Inventor:
Jorge M. Rodriquez
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Jan 29, 1991
Inventor
Jorge M. Rodriquez
Assignee (at issue)
BMC 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.