Granted Patent
Utility
US 5,582,626 · App. 08/371,474
Method for making refractive optical elements with graded properties
Inventor:
Richard Blankenbecler
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: Jan 10, 1995
Inventor
Richard Blankenbecler
Assignee (at issue)
LightPath Technologies, 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.