Granted Patent
Utility
US 4,885,186 · App. 07/291,630
Method for preparation of silicate glasses of controlled index of refraction
Inventors:
Brian G. Bagley, William E. Quinn
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Dec 29, 1988
Inventors
Brian G. Bagley
William E. Quinn
Assignee (at issue)
Bell Communications Research, 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.