Granted Patent
Utility
US 5,630,857 · App. 08/441,275
Process for manufacturing GRIN lenses by melting a series of layers of frits
Inventors:
Xiaojie Xu, Michael E. Savard
Patented Case
View Patent ↗
Granted: May 20, 1997
Filed: May 15, 1995
Inventors
Xiaojie Xu
Michael E. Savard
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.