Granted Patent
Utility
US 5,198,270 · App. 07/789,734
Method of forming a fiber preform with dopants dissolved in a liquid
Inventors:
Matthew J. Andrejco, Brian G. Bagley
Patented Case
View Patent ↗
Granted: Mar 30, 1993
Filed: Nov 8, 1991
Inventors
Matthew J. Andrejco
Brian G. Bagley
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.