Granted Patent
Utility
US 5,558,693 · App. 08/319,394
Methods of making optical waveguides
Inventor:
Arnab Sarkar
Patented Case
View Patent ↗
Granted: Sep 24, 1996
Filed: Oct 6, 1994
Inventor
Arnab Sarkar
Assignee (at issue)
SpecTran Communications Fiber 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.