Granted Patent
Utility
US 6,161,398 · App. 09/057,840
Methods of and systems for vapor delivery control in optical preform manufacture
Inventor:
Fred P. Partus
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Apr 9, 1998
Inventor
Fred P. Partus
Assignee (at issue)
LUCENT 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.